RPMiller, in another thread you asked for a list of tutorials that would strengthen your Photoshop skills. I highly recommend the tutorials by Deke McClelland at lynda.com.
While the tutorials are not free, there is the option to subscribe to the site to get the tutorials on a monthly basis. I pay 25$ per month to access the tutorials. A very good value in my books. I could not recommend them more.
In particular, the best series is here:
Second best is the videos here:
Hope that helps,