I normally just give it time... You can for example get a piece of paper and a pencil and sit everyday for about an hour or two (not necessarily straight) and start sketching whatever comes to mind...As long as it's related with any function you would want to give to this "something".
Stand on your head! Or dangle your head upside from a chair! Seriously! Look at things upside-down and inside-out. Pretend to design like someone else for a day. Do something you've never done before. Getting outside of your comfort zone can provoke unintended new ideas. :)