As you read this post i'm probably somewhere in Australia, teaching classes during my first ever Australian and New Zealand tour.
Sizzix dies can be great source of inspiration, useful for all kinds of mixed-media projects, different styles of creating. I love using them as little bits of texture in the composition as well as keeping the leftover and using as such mask or stencil.
The project below, from "Splash"class is the example of using such techniques.
Here are the details of the project - take a note on using the Tim Holtz Sizzlits Decorative Strips used both for masking and layering: