Originally posted by Inkwolf
I said to heck with cadence. ***** trying to get a good workout. No more rushing to be on time. I left home an hour early and went at a leisurely pace, enjoying the scenery. (Dandelions have appeared everywhere!) I got to work early enough to eat dinner and read a book out on the picnic table behind the library.
I had more energy on the ride home tonight than I have had since I started commuting, and more fun on the entire ride, too. Maybe I've been pushing myself too much. 
Ahhh...if only I can learn this technique of enjoyment!
Way to go, Inkwolf. After all, if we were in a rush, we'd be driving a car.
As to your night commutes, the combination of front light(s), reflectors all around and blinkies should cover it. Don't worry about passers behind you, just keep your line and stay highly visible.
My concern about the dark is seeing what's ahead. Cars can bomb over sticks, stones and ruts but bikes can go down. If you are riding at night, you will need front lights bright enough to illuminate the road. Could you invest in something really bright?