ABC stands for: Always Bring a Camera. The camera will allow you to capture those ideas while they're fresh, even if you don't use them right away. The world is full of vibrant patterns and textures, just waiting to be worked into one of your creations! In a class or workshop, teachers or classmates will often allow you to photograph their pieces--not to be copied, mind you, but for inspiration.
The camera can also serve as a layout helper. If you lay out your pieces/blocks/design on a design wall or table, you can use the viewfinder as a reducing glass, giving you a better perspective (specifically one from a distance). You can photograph the layout, switch it around, and then compare several layout options simultaneously if you have a computer nearby, or consecutively if you don't, then choose the one you like best, and reconstruct the design by using the photo.