How do you avoid burnout when working on personal/hobby projects?

"passing out/exhaustion"

On a more serious note, I'd say having limit, defining how much time to spend on it every day, etc. I know that it's not easy and you will still have ideas, but it's better to write them down for later use than always "jumping" on it.

PS: Having some hobbies that don't require a computer is also a great thing, dare I say mandatory.

If there is a way, I'de love to know. I've hit this wall where most days the moment I open an ide to work on a personal project I just close it right after :s

Do something else
Play with the dog, do some kind of sport.
I'm not a sporty person, but found a group of people that play ice hockey just for fun. And it's freaking fun :D

Only doing stuff I’ve learned and don’t trying things I don’t understand yet

By burning out at work instead

That and beer and just spending 3 hours on the internet looking at memes

Taking time off of it regularly. I've nearly had one myself and started to work less on it and take more rest.