In one of the other threads someone requested for me to share some of what I know about saving your images for the web etc. Recently, I was pointed to this tutorial over at Sweetshoppe Designs, which includes a lot of great tips on lots of things, and offers free downloadable actions for saving your digital layouts. So, if you're looking to improve your saving process, you might want to check out this article:
Another interesting tutorial on saving crisp and clear layouts is Sheri Malcolm's Using the High Pass Filter in Photoshop.
K. I hope this helps.