My theory is always shoot at full resolution. You might get a shot of a lifetime, and disk space is cheap. With my 2gb card I can get 1234 photos at full resolution and fine setting on quality (best). That is what I shoot. I use the Free Google Picasa2 image program, and it is super easy to organize, tune, and output photos. If you need a smaller one for email or an Avtar, it is a snap. The photo in my post above is resampled down to 400 pixels for the web, but looks fantastic at the full 6mp resolution.