Sherryl Clark at Absolute Write does not want to hear your excuses for why you don't have time to write. So don't even try offering them! Seriously, some of us need a slap in the face when it comes to getting realistic about how much time we need to write (like exercise: doing it for fifteen minutes a day is better than not doing it at all.) If you've been too busy lately, check out her essay No Time to Write? and you just might be shamed/inspired to get to work.