Burnout is real and almost everyone has gone through it regardless of their career.
This happened to me, made me lost my side gigs and almost made...
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Rest, eat well, try to overachieve (success helps burnout a lot, failure makes things harder).
Don't look back or self-reflect on performance too much, look forward & do the next thing.
Sleep. Eat. Build your way out of it. Find ways to enjoy it.
This.
Take proper rest 🏖️, meditate 🧘♂️, do yoga 🧘♀️ and Chant Omkara 🕉️ mantra.
One the of the things I did is meditate and it worked