Cut sugar and energy level

I think in general if you eat carbs that "burn" more slowly, your will feel more energized for longer. This isn't just "added sugar" (although it is a start). And I don't think you need to cut it entirely out, because that will drive you mad and you will most likely become obsessive over it (don't fuck up your relationship with food, trust me). I also find that if I limit the super processed carbs (junk foods, even salty ones, made with flour), my energy is alot better. I definitely recommend against morning pastries of anything of that sort (those knock me out for sure). But eat the dessert if you are at a nice dinner. Live your best life.

Big for me was reducing caffeine to just one cup per day. Really evened me out and I catch a second wind at night now

I cut out caffiene. The withdrawals were insane for two days. Now I'm functioning as I would with coffee. My sleep quality is also much better.

Cut out as many carbs as possible too.

I try to eat as clean as possible. Have lapsed due to COVID but back on track now that the gym is open again.

Def cut sugar and try to eat smaller meals to prevent yourself from getting overly sleepy.

Just intermittent fast when you’re at work. You won’t have that tired post lunch 2pm drag.

Eat a fattier breakfast w/ no carbs and you'll be fine