Here are some of my favorite resources that I found....
* Drop Shadow Tutorial by Peppermint of One Little Bird Designs
Best drop shadow tutorial I have seen so far. She explains the how and the why very well..and you won't get lost in any technical jargon. It may seem like a lot to read but once you start experimenting, you will be glad you did.
* Masking Tutorial
Want to know how to make that string loop through that button? Check out this wonderful tutorial. I used to always just erase away the parts that did not need to show...but this tutorial will teach you a better way. Better, because if you use a mask and "erase" too much, you can get that piece back in no time without worrying about your history saving every step.
* Sharpening for the Web
Wonder how some pages look so sharp in the galleries? Try out the steps in this tutorial. I believe there are some actions that will do this for you if you feel there are too many steps involved. It doesn't really bother me anymore as I have it down to a science.
I almost own her entire shop of actions available for Photoshop...and I love every one of them! The link takes you to a video tutorial that she did describing how she edits a photo. Very informative! I always scroll through her site, you never know what new information you will come across. She is one of the sweetest photographers..she is always doing something on her Facebook page.