Smartest thing EVER! when you have to hang something with exact holes, photocopy the back and use as a template! Have also seen this done on wax paper - put wax paper over the back of the item, poke holes or use sharpie to mark holes, then tape on wall.
Start on January 1st with an empty jar. Throughout the year write the good things that happened to you on little pieces of paper. On December 31st, open the jar and read all the amazing things that happened to you that year.