I know that I promised to make these posts a weekly occurrence but, I've been a little busy (oldest excuse in the book, I know), but I've still got tons to share. From The Complete Tightwad Gazette p. 60:
What to do With:
1. Toilet paper tubes. Use to gather up unsightly loose excess electrical cord on kitchen appliances, lamps, entertainment center, etc.
I actually use twist-ties for this purpose (from bread bags, new purchases, etc.). They work pretty well - and I would just use rubber bands before I used toilet paper tubes.
2. Crayon bits. Place a variety of colors in a muffin tin and melt in the oven. Cool. This makes a scribble cookie. Each one has its own unique color and pattern. Use for an inexpensive stocking stuffer.
I wonder if you could do something similar with soap bits, once you've whittled the soap down to a size that's too hard to hold onto. I know some people place all of the soap bits in a loofah-type bag and use it to make the soap last.