I have heard a lot of people talking about AFK bartering all day, grinding for endless hours, or many other forums of intense and focused game play.  Those are valid ways to play the game.  However, the is another option.

Diversify Your Bonds:

I shifted into a well balanced system that feels better and still offers and unlimited amount of time investment.

-- Tending your farm (The easy way, I don't fertalize, I don't prune, I don't care about moisture).  You can simply plant crops and pick them when ready.

-- Alchemy (Optional way to make profit/supplies)

-- Cooking (A good way to pass time, make a little money, and be self sufficient on beer/supplies)

-- Grinding (Always drain your Agris, anything more is gravy)

-- Life skills (Gathering, Butchering, Saps, Mats)

-- Overnight processing / Fishing

All of these systems work together in unison.  The amount of gathering is dictated by energy.  The amount of cooking is determined by Imperial and personal goods.  The grinding is determined by dailies/agris/preference.

The systems are linked.  I turn in Imperial, consume my energy, and pick up crops in a single rotation.

There is never enough time.  I could always cook more, grind more, process more, etc.

If your tired of running in circle all day there are other options.  This also gives a lot more progression goals in life skills equipment and mastery break points.  It can also be done in an effecient and profitable way.

This is a korean grinder. Girinding most of time is the intendeed way to play it.

Also:

-Farming is only good to kill your braincells, even griding is more fun than that literal chore.

-Alchemy generally not profitable, and that is an AFK activity, hence not going to affect your burnout

-Cooking AFK activity aswell

-Technically you can grind herbs isntead of mobs if you want valeriy, though it requires investment to do it effectively, which will be loss at the end as you could've jsut spent that money on your real gear instead.

-Overnight fishing not going to make you getting burned less either

All you listed here is the literal definition of going in circles, as it's tl.dr: grind when you play, cook when afk, keep your char fishing at night... but you still only grind when you play.

There are a lot of specifics that are not listed, but those doing the activies should be aware of them.  There are also options not listed such the Milking Cows mini game.

It works a bit like this.  I just AFK'd during the night, work, school, etc.  The first priority is to drain off that energy.  But how?  Milking Cows? Gathering Sap? Sheep Mountain? Lion Rotations?  Snake/Scorpion Rotation?

Right from the start, of course these are simple tasks, but it's part of a bigger picture.  You might do a Lion rotation to cook enough boxes to turn in your Imperial.  It's also important to realize that is NOT the same as grinding.

The main difference is the play style.  It's much slower.  Less competition.  Less actions per second.  And it's only for a limited time.  When that's done you can grind in a location near the gathering if you plan accordingly.

Additionally, while there are serious requirments Cooking is no longer much of an AFK activity for me.  I have maximum speed and don't waste silver on expensive tools.  I'm quite satisfied with burning through cheap NPC utensils and being much more active.  Additionally, the supplies won't last.  It will require trips to the warehouse often and maids.  It will also require swapping out items, restocking the utensils etc quite frequently.  It's a far stretch from 12 minute intervals of just AFKing them.

Overnight processing is also part of the equation.  In order to have enough supplies for cooking each day I will need to process daily.  Whether you do that or fishing, it's just part of the bigger 24/7.  The real value isn't even the fishing or processing.  It's the energy and worker empire working during that time.

However, if you didn't do those AFK activities you wouldn't have the materials and energy for the next day.  That was the main point of mentioning them.

You can also debate the income quite a bit in either direction.  To some extent ALL grinding is a waste of time until you have soft cap CP.  If you put it on a long term plan.  My passive income per day is exploding into 100's of millions per day and even if I transitioned to grinding all day, I would still get that income every day on top of my grinding.

If you think grinding is OP income try creating a setup to gain 300M+ per day for 10 minutes of game play.

I've been playing with this mindset for half a decade successfully.

On Kakao forums there was a clown named 2Cents, aka Vortexii that claimed for years this wasn't playing the game.

Guess he sings another tune now ROFL.

you are free to play the game as you would like, and i am glad for you if you enjoy playing the game this way but allow me to point out that 4 out of the 5 the activities you suggest are done afk, so basically you are saying that the best way to not get burned from this game is not to play it, and that is ... welll... obvious isnt it?? my impression of the problem is that even with the developers having acces to great graohical technology due to them being korean and korea currently been one of the top when it comes to technology they simply dont understand the concept of fun, i have difficulties understanding how someone can consider fun to have the sooooo many inconveniences and unnecessary overlycomplications.

in my particular case one of the problems (related to this particular topic) i have with this game is the ammount of times you immersion is completely broken in order to get things done, in example:

-You go buy some trade gods to port rat to do some trading in calpheon and you have to change channel at least 4 times to get your ship full, that already is 1 hr of doing noting in order to do buy the gods, but then you have to spend anywehere between 45 min to 4 hrs changing channels randomly to find a channel in wich to get your stuff sold, and that assuming its not sold out!! that on itself is an incredibly stupid design but on top of that having to change channels every 15 min just for that while i am doing bartering also ruins my bartering immersion. how is that fun?

-You feel like grinding for a change and go to your prefered grinding spot and just as you start someone comes and invades your rotation, you change channels to try to solve the problem and the spot is taken, AGAIN you have to spend 15 min doing something else that you didnt want to do to begin with and when the cd is gone the next channel is taken too, you have just spent 45 min not doing what you wanted to do, once again breaking your mood, how is that fun?

like this i could list you at least 10 examples of how game mechanics that prevent players from enjoying even the simplest of activities, it the end it becomes frustrating, the frustration piles up and then you burn out.

Preventing burn out is getting involved in all aspects of the game. 

You need a combat set-up and a life skill set-up. 

With both of these, you can go after lofty goals like level 65, or 30k quests, or icon leaderboards. 

The best way I have found to prevent burn-out is to never try to do everything at once. 
Goals are easier to be met when you focus on them, but they also create burn-out.
So have other things to do when you start to feel the drag helps alot.

I personally work a boring office job, have a wife and kids to feed, and have bills to pay. Maybe try going back to school, starting a family, or focusing on getting promoted at work. It's hard to get burnt out in BDO when I have other things to deal with. My BDO gameplay is literally just buy food from the marketplace, turn in the guru crates, and do a quick RBF. 

I love the grinding myself. What I do to prevent burn out is to just get a good show running on my phone or the second screen. Bdo makes it so that you can essentially grind effectively on mobs that aren't a huge threat with divided attention. 

Yes, this isn't practical for many folks, but it's one way to deal with the grind when it gets onerous. I would also recommend no more than an hour of grinding per session. I have always thought it was unhealthy to spend more than an hour or two in a grind, but to each their own. Just be sure to stretch including your wrists.

Best way to prevent getting burned out...if something isn't fun, don't do it and do something else in the game that you do find fun.