Do you take/use a lot of screenshots? I take a ton of them at work when I create How To documents. I take quite a few at home too.
If you do a lot of screenshots and want some easy to use editing tools to go with it, I highly recommend SnagIt. It links with your PrtScrn button and works like a dream. You can even capture videos with it. The editing tools are great, you know those torn page graphics? One button. You can add call outs, dialog boxes, circle items, blur or zoom in, this list goes on and on. SnagIt costs $49.95, but if you do a lot of screenshots it is invaluable! You an do a free trial to check it out too.