I have run three times a week since doing C25K and then as a graduate (except for one weeks rest because of shin pains)! I thin having a mental commitment to three times a week has helped me and running is now part of my routine. The other thin that helps is to get my running gear out ready the night before! Also getting dressed into my running clothes means I won't not run after all that effort. On running rest days, reading about running and using the forum keeps up my excitement about my next time out. What do you do to keep up your enthusiasm and commitment?
For me, lone running is best so booking an event, joining a running club etc just don't work!