I was reading through a magazine the other day and found an article about Orts. I had never hear of this. It turns out that Orts are the left over threads. Evidently sewers keep these and then use them for lots of different kinds of projects. They all seem to have a special jar just for this purpose.
I found this great ORT Jar Tutorial. So you say now I have all these threads and my jar is full what do I do with them. Here are some great ideas I found: