the easiest way is Paint. With Paint, you can do very basic and easy things. That's how I started off. The best program is probably Photoshop. It can really get confusing. I'm still learning how to use it. I haven't found any really good tutorial sites on Photoshop, but there are good advice sites out there. The best thing to do is play around with it (Tommy's tip for me). That's how I got started with it.