Yeah, frequently. Force yourself to write something and get it out there. Applies to programming too: how many times have you put off actually coding a project because you're still tweaking the design? If you're me, too many times. Just write and get something committed -- you can always tweak later. There was just a discussion of this here: if it's worth doing, it's worth doing badly (https://news.ycombinator.com/item?id=11262448).

(I still struggle with this, not preaching down at you from a high mountain. Very far from that in fact.)