I use the bigger ones for holding cash (a disposable money clip). And most always have a couple in my bag. I also carry duct tap and rubber bands, because with those 3 items i can fix anything!
There was a guy that had 1 paper clip and he traded it for something on craigslist and then traded that for something.......... in the end he ended up with a used Porsche Boxter.........
1. Reset electronics like routers, modems, etc. that have a reset hole in the back.
2. Hang Xmas ornaments on tree.
3. Unlock bathroom door that kid is locked in.
4. Clean your fingernails.
5. Repair glasses when screw is missing.
6. Replace missing button on shirt.
7. Clipped to zipper to make pulling zipper easier for kids.