It used to take so much energy for me to start working. But on Modafinil I switch to emacs and start hacking.
I bet I'm going through a honeymoon period, but I'd say I've learned more about programming this week than in any (any!) month of my life. I feel really focused.
Many use it to avoid sleep. I don't; I get eight hours of sleep a night. I'm trying to avoid crashing, burning out, dependency et cetera by using Modafinil like an antidepressant, not a five hour energy.