I avoid this problem by biking as much as possible. Granted, this wouldn't work if I lived in the suburbs an hour's drive from work, but since I live about a 15-minute drive, that works out to a 35-minute bike ride. Multiply that by two for every day I work, add whatever extra minutes I spend going to friend's houses or grocery shopping, and that's a lot of outdoor aerobic exercise, which improves my mood hugely. And I arrive at work awake and pumped even for 6 am shifts.