Some folks put stick on labels with theirs, I just add a note but someone, Texas I think has this cool way of writing on a teeny seam on the back of the block. I have some of those nice labels too though Nanakat, a friend gave them to me for Christmas one year, you can get them from Herrschners.com or MaryMaxim.com for about 6 bucks I think, they are nice.
I've been sitting here digging through my stash, trying to find the right fabric to use to do my last two blocks... I can't seem to make up my mind tonight!