I've been using mapmyride for over a month now, to record my walks and bike rides. I use the mapping function to make and save all my usual routes for both commutes and recreational trips, and then I log my walks/rides daily. I did 200km in May, which is pretty good for a lazy so-and-so with three jobs and summer school going on. I find it's motivating me to get out and be active, which is a good thing since I'm supposed to lose 10lbs this summer (I've been 'supposed to lose 10lbs' for the past ten years though, so no promises for this summer.)
Here's my favourite walk:
I know there's tons of these run/walk/bike mapping sites out there, but I really like this one.