Someone asked me this week what was the big deal about brushes. They were familiar with using them like you would a rubber stamp, but that's all.
So, I thought I'd put together a little video on one of the ways I use the default brushes in PS. You can do this in PSE too, so check it out:
I've got the written instructions in a .pdf (without screenshots) for quick reference. Download it here and keep it in case you forget a step, or come on back and watch the movie.