How to not get burnt out coding at work and at home

I used to work 14 hours daily on coding, burnt out in 5 months after just 1 project. The key I learnt is to either have good project management skills or have a good project manager. A good project manager is a good risk calculator and calls out bullshit against the customer for what's not reasonably possible. If you have a good team of developers, you don't want them contributing to team attrition rates because they get burnt out. And then you always set buffers. Something that takes 2 months should be planned for 2.5 months - simply because people tend to give best-scenario estimates.