Photo Editing Software
Now you're ready to select and edit your photo. Let's look at software first. I use, and love, Adobe Photoshop Elements. If you're interested in a try-before-you-buy option, the Adobe Photoshop website has a free trial download available. The software I'll be using for this tutorial is an older Photoshop Elements (version 5.0 for Windows, the latest is 7.0), but please know you should be able to find the same features in pretty much any photo editing software.
I use the Organizer mode of PSE to review my photos and choose one that looks best. Once you've made your selection, click on it, then click "Full Edit" to bring up the Editor. (See Photo 1.)
By the way, as you're reviewing your photos, you can view a photo full-screen-size with the F11 key. (See Photo 2.)
And to compare two photos side-by-side, use the F12 key. (See Photo 3.)