My boyfriend used to throw out coins smaller than 10p. This used to annoy me because he easily threw out a few pound a week. He claimed he didn't like change in his wallet. I bought him a penny jar to keep them in and it fills up all the time. It's amazing how all those little pennies add up. It can even come in handy when you've got barely any money then you remember you've got some money saved up. It's simple and easy, there's no reason to not do it!