Photoshop Goodies

Techniques

How-to get Super Smooth Skin from creativepro.com
Collection of tips and tricks from PixelGenius

Getting rid of shiny forheads - from a forum somewhere.
Creating a custom brush shape using text - from Tim Grey's newsleter

Another technique for removing shiny skin.

Sites

PhotoshopNews.com - "The latest news and info about the top pixel-wrangling application on the planet"  Run by Adobe

If you use Photoshop frequently, then you should consider joining the National Association of Photoshop Professionals.  You'll get access the the content of their website www.PhotoshopUser.com as well as their magazine full of more tips.