Giving an Amazon gift card? What better way to celebrate the store that killed the modern day book store than by placing your gift inside the paper-y carcass of an actual book! People will call your gift wrapping "quaint" and "rustic," but you'll know the true meaning.
For some reason, craft people only ever want to make stuff out of twine and mason jars. We'll give credit this time-- these gift card jars look pretty nice. But, that still doesn't forgive the homemade mason jar chandelier making its way around Pinterest. Come on, guys...
Giving a card inside of a Christmas ornament is a great idea. The giftee can then use that ornament to hold photos of their children or any number of other people that you're sick of hearing about on Facebook.
It sounds obvious, but giving a gift card inside of a wallet or coin purse is a good way to add substance to your package. (Way better than searching "increase my package size" on Google. People must be mailing some weird things...)
Instead of just giving a Starbucks card, get some theming going on by putting it in an empty cup with some tissue paper. It makes the present feel much more substantial, because trust us, that cash isn't going to go very far at Starbucks.