You're familiar with the "Easy Button" from Staples, right? Well this little USB device reminds me of that, but you don't need to order any office supplies to use it. The Go To Sleep! USB Button ($16) quickly and easily puts your computer to sleep with a single tap.
Although you can program your Mac to catch some Zzz's just by putting your mouse in an assigned corner, the sleep button can be handy for both you Mac and PC users alike. Plus, I think it's kinda cute, and would have made a great stocking stuffer for that cube worker who often leaves their computer for meetings, breaks, or just to get some exercise during the day. No need to waste time mousing over to your computer's menu, just tap and you're ready to go.