Consistency

I found a little article today called "5 Tips for Developing a Good Meditation Practice". Here's a little excerpt:

Meditation should be a pleasant and welcome experience, once you get into a routine, you may find your mind hankering for those moments of peace. But if you feel uncomfortable committing to 15-20 minute sessions, allow yourself the freedom to practice regularly and briefly. It's better to invest 5-10 minutes every day in meditation, that to sporadically enter into 30 minute meditation marathons. Remember the benefits of regularity, and focus on developing a self-healing habit that's easy for you to maintain.

Also, just because you miss a day doesn't mean you have to throw in the towel. Once a great musician was asked the secret of his success. He replied, "Whenever I get off track, I get back on." That really is the secret. Whenever you get off track in your meditative practice, just get back on!