How do you go about having a life when you are working full time? Need to increase available energy, otherwise I don't know how it could be possible.
Conversation
I've had a lot of trouble with this in the past. Assuming you're doing the obvious (e.g. not working 80h/wk), one thing that's helped me is obsessing about sleep quality. Earplugs, great eye mask, no alarms, ensuring 8.5h+ oppty, better mattress, CPAP, etc—really improved energy.
3
29
Relatedly, I've also found significant improvements from cutting out alcohol after 8PM and caffeine after 3PM.
1
7
One more, while I'm thinking about it: on the occasions in which I've obsessed over sleep quality and *still* have struggled with this, it was often because I was unhappy with what I was doing during those work hours, which left me drained afterwards. Solving that helped.

