I'm gonna give it the 'ole college try because I love you all so much. I'm relying heavily on the interwebs for this one, guys, so don't go getting all impressed. These aren't my inventions!
These first few come from No Need to Apply - and the link there has a bunch more fab ideas!
And a few more from Buzzfeed (click on the link to see more and for sources and links to full tutorials)
Now go forth and create! Oh, and while you're at it, share your fave DIY projects with us!