More to explore:
A digital scrapbooking Photoshop tutorial from Sahlin Studio on: How to Create Shapes in Photoshop, AND Using Clipping Masks to Clip Papers and Photos. For those that are newer to digital scrapbooking, this is a great way to learn a new trick. And for those seasoned scrappers, it might give you some ideas on how to branch out with the skills you already have.
Photoshop clipping masks tutorial