That's what I did when I had a blog I put writing essays on. When I could do that, it was great. When I ran out of that stock pile, the blog failed and I finally closed it.
I have some basic ideas typed in, but until I sit down to publish one, they don't get fleshed out. If I have the time to log into the site, I figure I have the 15 minutes it takes to write something.
And part of it, for me at least, is the idea generation.