I forgot to answer your basic question. How stay motivated:

1. cold/hot rides are an opportunity for me to fine tune my clothes package. I keep a record of comfort level at various temps and then create a cheat sheet of what to wear so I just look at my cheat sheet and grab what it says. Only problem with it is as get in better shape, I need to wear less.

2. feel better
-- lower pulse rate
-- more energy

3. save money
-- bike is 61.2% paid off. once paid off, then I can plan for new purchases.

4. save time
-- don't track this, thanks for the suggestion. I really should. It's about 5 hours a month that I save.

5. finally, drum roll, wife rewards the better conditioning.