A sharp idea...

I just ran across this sharpening tutorial on photojojo.

If you don't think about sharpening your images yet, you really should read this tutorial.
Personally, we often use Kevin Kubota's Magic Sharp action, as well as a combination of high-pass overlays.

Check out the tutorial here. http://photojojo.com/content/tutorials/photoshop-sharpening/

do some follow up reading with ron bigelow's tutorials here. :-) http://ronbigelow.com/articles/sharpen3/sharpen3.htm

Happy sharpening.