Finding motivation to exercise seems to be a common problem among anyone who's looking to add healthy habits to their life. Self-improvement site Zen Habits has a list of 31 different ways you can find that exercise spark, including visualisation, endorphins, and success stories; however, I'd like to hear from you. What motivates you to get out there and just do it? What keeps you motivated, even when you just don't feel like it? Let's hear in the comments.