Reusable rubber twist ties are the type of thing you didn't know how you lived without before you had them. The uses for these guys are endless if you think about it:
Hanging tools, tying tent poles together, organizing your home theatre cables, keeping fishing poles together. These are just a few that came to me off the top of my head.
These ties have a soft rubber exterior, are durable and waterproof. They bend easily, they offer just about any size you need, too.