If you’d like to know how to use Photoshop layer styles there’s some good info on installing them and using them HERE
If you’d like to know how to use Photoshop custom shapes, there’s some good info on installing them and using them HERE (and she’s got tons of great freebies on her site too!)
If you’d like to know how to use Photoshop brushes, you can find a tutorial on how to install and use them HERE
If you’d like to know how to use Clipping Masks in Photoshop, you can find a tutorial HERE