A couple of things I've reused are:
1. Crystal Light plastic can-I covered w/scrapbook paper and put all my crochet hooks in it.
2. Powdered baby formula can-I covered w/scrapbook paper and put my pens in 1 and my chopstick, sewing gauge, marking pens int he other.
3. Small but sturdy boxes-We buy the Fiber 1 bars at Costco and the boxes are long and narrow and very sturdy. I have big drawers to hold my FQ's and wanted something to sort them by color. These boxes are working perfectly! I just cut the tops off and in the drawers they go! Now when I want to pull a certain color for a better look I have them all together and can pull them out and put them back easier...
4. Easter Baskets-I went to Walmart after Easter this year and they had square baskets w/handles that fold down for $4.00. Perfect for holding bigger projects on a shelf...1 basket per project!
5. Plastic zipper bags that bedding comes in-I think a lot of us probably reuse these! I have started a Prayers and Squares ministry at my church. These bags are perfect to put a kit in along w/the directions. Send the quilters out the door w/a kit and back comes a completed top!
6. Plastic baby food containers-great for pins, bobbins, etc.
That's about all I can think of that I reuse but I'm going to bookmark this topic so I can check back often for new ideas!