You know when you use a bobby pin and it bends open a bit after one use - two if you're lucky? What do you do with it? You can't use it again for your hair. I used to just trash them.
I figured - just the other day, mind you - why not just bend them back?
I took a pair of small pliers [I used the kind for beading/jewelry] and just applied a bit a pressure just above the bottom - where its bend is out of shape. It worked like a charm! And I was excited!
This may be common knowledge - especially among all those ballerinas - but it never crossed my mind before last week.
So. There you go.