I have a lot of paint swatches around (from numerous projects) and I decided that I either needed to 1) throw them away or 2) do something with them. So of course... I found a something to do with them. I saw these little paint swatch note books and thought they were a fun, functional idea.
Here is what you'll need to make your own:
scissors and/or paper cutter
paper for the insides (I used plain and graph)
 start by trimming off the round corners of your paint swatch
note: if your paint swatch is squared off already, then skip this step!
 measure 1/2" down from one edge a score with your exacto blade
(make sure not to cut all the way through your swatch - this will help make a nice fold)
 fold the opposite end of the paint swatch toward your previous fold.
make sure it overlaps just a little amount - this will be how your notebook stays closed.
 Measure your notebook. Mine was about 3"x3".
Based on this, I cut my inside paper to 2-3/4" x 2-3/4".
Staple about 15-20 sheets under the first flap you made.
 Don't try to put more than 15-20 sheets of paper... or else you might end up with this:
 you're done! now make a bunch for your friends!
...and one for your purse, your desk, your car.... you get the idea...