Here's a good tip we noted from a recent thread of comments in our Unique Ways to Wrap Presents? post from reader, TheGreenLife, who recommended using reusable shopping bags to wrap up gifts. A video of how to do this is shown below the jump and could be modified to be used with other bags besides the brand shown...
Baggu bags (mentioned last year by ATNY's Aaron) are available at their official site and also here. And be sure to check out several of our other gift wrap related posts from all over the AT Network:

Shaw's Original Fir...
Clever and smart idea...
nice idea!
I have a few Baggu bags I bought on Amazon. I always keep one tucked in my purse and it's come in handy sooooo many times. They are extremely strong and light.