“When you’ve spent 15 minutes sitting in front of the computer trying to think of some smart thing to say in your post. You know you have better things to do. So go do them instead.”
No really, good things don’t take 15 minutes of thinking before you can put them down. They usually take 15 minutes of writing before you realize it’s worth writing about them in the first place. So don’t waste your time on things you’re only going to force yourself to write badly. There is always better time spent out there on what matters.
Don’t you think it’s time you do them?