Cut 2 pieces of patterned paper into 4x4 squares and cover your coaster with them. Trim and distress the edges, use distress ink to make it look nice if you desire :)
Use scalloped punches, nestabilities, or SLICE to cut nested circles to decorate front of post-it in colors complementing the patterned paper on the coaster. Also decorate a library clip with a scrap of patterned paper.
You can also use a piece of ribbon wrapped around the coaster to attach a pen or pencil. I glued down the post-it note pad for extra security, so it would not fall off.
Here is one of my finished note holders, front and back.
This post-it holder is made with the Graphic 45 paper line called Steampunk Debutante. On the back, I used one of Tim Holtz's fragments to create a point of interest for the old man to look at. This paper line from Graphic 45 is a little weird, but you can have lots of fun being creative with it! Hope you have fun too :)