Use your coin jar to buy gift cards with Coinstar (with no fee)
One of my favorite holiday hacks is to use my coin jar to buy Christmas gifts. Our coin jar amasses quite a few coins by the end of each year, but I'm too lazy/busy to roll them up and take them to the bank. Instead, I take the jar to a Coinstar machine (there's one at a grocery store in town) and cash it in for gift certificates. Coinstar charges a fee to turn your coins in for cash, but turning them in for gift certificates is free!
Coinstar has a bunch of retailers to choose from -- Amazon, Gap, ITunes, and more! (The Coinstar website contains a full listing of participating retailers.) I usually end up with at least $100 for Amazon, which covers a nice chunk of my Christmas shopping.
Brilliant. This hack is also great for kids and their piggy banks.