I've been away for a while, so if someone has already posted this thread, I apologize.
I finally found something that really motivates me to work out. There is a game called The Fitness Challenge that is played by 2 people. Everytime a player works out, they get a star worth a certain point value. Whoever gets the most points wins a coupon from the preselected prize booklets. My friend and I have been playing for 3 weeks. So far, I have bought her a manicure and she owes me a CD and a movie of my choice. The best part is, prior to this I rarely worked now. Since we've started, I work out at least 30 min a day, 5 days a week!
The game lasts for 8 weeks (because that's how long it takes to form a good habit) and can be played for a prize at the end of the 8 weeks, or a prize every week, it's up to the players. They even have a website for people who need a partner to play the game.
I really recommend this for anyone who wants to get fit but is having trouble getting motivated.
Hope this helps.