From what I have observed and heard about, there are hundreds of ways to use a paper clip. So I am going to talk about 4 different ways I have used them in my life. Because these are things that I know will work!
1. My personal favourite, they go great with an elastic band. I used to bend a paper clip into a miniature bow, attach an elastic to it and shoot toothpicks with my action figures. It also works well if you bend the paperclip into a mini slingshot and shoot the elastic around....I had fun as a kid.
2. A fishing hook. This is something I never thought actually worked. But a friend of mine decided to try it a few years ago at his cottage and wouldn't you know it, we got a couple bites. They do break after a couple uses, but as cheap as they are to buy, they definitely can come in handy as a backup plan.
3. A cleaning tool. Great to clean dirt out of small areas. Remote control, video game controller, cracks in wooden furniture, appliances, etc. It really works well to clean anything you can think of!
4. A bookmark. They were built to hold multiple pages together, but they work great as a bookmark as well. Also work well as a page marker in textbooks or any book you want to revisit later on.