Homemade keychains: take some old credit cards or gift cards and cut into thirds (thick) or fourths( if you want it real skinny). Next use any type of colored paper or scrapbook decorations to add pictures, names, designs, etc.
Missing ingredient in most DIY Mod Podge coasters instructions: "Envirotex" to waterproof them!! This blog explains (wonderfully) exactly how to use it!!! :) Glad I read this before I tried to make mine!