Maybe you could make something little out of Lego and keep it somewhere you can play with it when you need to.
Hey yeah. Hadn't thought of Lego. I don't actually own any but I can buy some as a Christmas present to myself.
That is a cool idea, thanks!
As for hair, my mum has pointed out to me that when I get a bit stressed I tend to pull at mine a bit. Not pull it out, but pull on it at the side of my face. I had not noticed before but apparently it is a giveaway as to how I am feeling.