[ttiurani]

On the same boat with 25 years of programming behind me, and similar thoughts.

My 3 counter points to OP.

1. Sleep as much as you can. Looking back I have produced the best results when I've slept close to 9 hours. Too much sleep is almost never a problem because I can't produce high quality code for more than about 6 hours per day. When I try, I just tread water, because I have to fix what I did the day before. (If you have more than 10% monotoneus coding you can do almost asleep, you haven't yet fixed the code to eliminate that work, or are in the wrong place.)

2. Try to get to a place where your "career" doesn't matter. This is a privilege that may be impossible to get, but if you can, try to be "just" a team member many times during the years, no matter how high up the ladder you've ended up earlier. IMO that's the best way to keep learning and improving in the craft.

3. Most importantly, read, understand and internalize how you impact to the world as a technologist. Get a deep understanding about society, ecology and ethics related to technology. Know where the money flows, keep crystal clear who gets wealthy and what gets destroyed to generate that wealth. Aim to get to a place where your code is net positive for the world based on that knowledge.