Editing is not a required part of photography, but by tweaking your photos just a little bit you will definitely see the difference. I haven't seen a photo that couldn't benefit from a little retouching. Most publications, whether it be newspapers, magazines or newsletters tweak their photos using a photo editor.

In these examples I use Photoshop, a professional but expensive program. If you don't have access to photoshop there are other photo editors that you can download online. I would reccommend Picasa, google's free photo program.