Design is something that lives off the thoughts and ideas we develop from a multitude of inspirational sources. These sources include but are not limited to nature, product design, print materials, motion special effects, and so forth.
Whether you're into web design, print design, or both, collecting and storing inspirational pieces of work are essential. Browser bookmarks can be used to save website links for future gazing, while print samples can be stored inside a folder/drawer for easy access.
Some may look at this as cheating and being unoriginal, but design it is all about forming new ideas from the things we like and the things that inspire us. Some of the most creative works out in the wild have clear representations of where the concept and visual execution ideas came from.
Bonus Tip: If you have a camera phone, use it to capture inspiration. It's fast, and easier to store than having a physical sample. Have a digital folder for storing all the snapshots.