This is an excerpt from a July 2006 article in CardMaker magazine:
Card Crafting Basics
Card crafting is easy, creative and fun. Collect basic tools and supplies, learn a few simple terms and techniques, and you're ready to start. The possibilities abound!
Rulers - a metal straightedge for cutting with a craft knife (a must-have tool). Match the length of the ruler to the project (shorter rulers are easier to use when working on smaller projects).
Quilter's grid ruler - Use to measure squares and rectangles.