Loving your bike = more commuting
I commute almost every day (except for the really cold rainy days because I don't have good waterproof gear and I don't feel safe wearing my hood underneath my helmet because it limits my peripheral field).
I love my bike and I love riding it :) I think the best way to ensure you'll commute is to make sure your ride is comfortable and fun ;) So hopefully if your bike is in good working condition and fits you well, you'll be eager to ride it! I look forward to my ride to and from work every day :D It gives me good time to relax (well, depending upon motorists I suppose...) and get some fresh air.
Good luck commuting! :D