The one thing I find annoying is going to put on a necklace and spending half an hour taking all the knots and other bits of jewellery out of it! This is a good tip for both at home or when you are travelling, to keep your necklaces from tangling up.
Just thread one end in to a straw and do it back up. If you want to make it stay in place you can make a small slit in one end and feed the necklace on it.
I do it for my bracelets too – just chop a straw down to fit!