The great thing about having friends who are Apple fans like myself is there's always a spare charger (or 7) lying around when you need one. The flip side is the guessing game which ensues when all of us get together and we're all ready to leave, where each of us have to figure out which "they all look the same" charger belongs to whom...
Plan to attend an event where everyone will be charging up iPhones, iPads and MacBooks out together? Forget it, I know from experience. I don't think a single person went home from a recent fantasy football draft I recently attended with the same cords they walked in with. For a person that tries to take care of their cords (properly coiling the cord every time), it's a problem.
That's why I love this solution from Marjorie of The Kipi Blog. She used an array of rubber band stripes to "mark" her iPad and MacBook chargers. It's simple, great-looking, and can be as permanent or temporary as you choose.
Marjorie used Plastibands, a latex-free brand of bands that are recyclable and three times stronger than traditional rubber bands. Plus they're insanely colorful, allowing for these summery combinations of shades.
More info and images: The Kipi Blog