Most underrated thing a founder can do for themselves(and their company) is planning days off/ blocking a few hours a day to literally not work and recharge.
@sasha_buratynskyi i don't have hours off, but I do take a day off in the middle of the week to not work. I look forward to that one day to let my mind run free and supplement the day off by working on weekends.
Sometimes you need to rest your mind in order to be productive. Working non stop is unhealthy. Find activities that include physical movement away from the screen. Running, fitness, sport etc.
Burnout is real and I have seen it.
When I faced burnout, I increased the interval between using those things that bring me joy and happiness, such as reading in the evening. I started spending more time on myself and the burnout went away on its own.
Personally, I develop physical symptoms that force me to take a break. I really don't recommend that method.
As far as useful suggestions go, fit something into your day that's just for fun. Maybe a quick mobile gaming break, or some drawing, whatever grabs you.
Just keep working, maybe take a 20 minute nap if necessary.
Burnout is thrown around all the time but the reality is, most people aren't even close to burnout.
Just think, if a farmer can work 7 days a week, 365 days a year and not stop, how are you getting burnt out?