[sns989]

I am sure you've heard all of these but they worked for me: 1 month of doing this on the regular and I've never been more productive.

All you need is 40 hours a week of solid productive work. that's it. Get that in your head and work from this first principle.

make time for downtime - allow your mind to wonder and be bored and go off tangents sometimes. Counterintuitively, that's part of the magic. do some breathing exercises throughout the day(if you hate meditation like me lol)

Get a gym membership and do a rigorous workout 3/4 days a week.

Become friends with water: seltzer, regular, fruit-infused, tea, it doesn't matter. drink lots of it. It'll have 2 main effects: keeps you hydrated of course(with the many benefits) and it makes you get up every few hours to go on a break.