At least for me.. I don't know if anyone else does this, but I keep a 'post' folder on my desktop that I save a pic to whenever I get an idea for a post. This way, there is no sitting, staring at a blank post page trying to think of something to write about..
It really works! I find that somedays I will find something I want to post about later.. like 3 or 4 things, but I try and limit myself to 1-2 posts per day, so this way there is always a flow (or overflow?).. is that the right wording??
:P