on how to do 'touch up' photos after you've taken them?

I'm thinking along the lines of color adjustment, cropping or image resizing without loss of detail, etc.

I'm used to just shooting and taking what I get. Would be nice to actually learn the other half of the publishing process.

<a href="http://www.jmg-galleries.com/articles/color_correction_made_easy.html">should be a good start on some of what you're looking for</a>