I depends on what kind of work you're doing. Meaningful programming is a creative endeavor. If you try to do more than 8-10 hours of creative work a day, you'

I depends on what kind of work you're doing. Meaningful programming is a creative endeavor. If you try to do more than 8-10 hours of creative work a day, you're actually setting yourself back. I try to average 8 hours of work a day, with bursts up to 12 hours if I'm on a roll or really excited.