1. Step Back - Taking a step back can really help to generate a new idea or a solution to problem. Just step back from the thought and a little later it will automatically pop up. I have gotten my best ideas in the shower or while driving - after being away from the computer.
2. Just Walk Away - Walking away is a great way to refresh yourself and empty your thoughts out so new ones can form for you. Walking works for me to find a solution to a problem. It can give you a different perspective.
3. Read - Reading something else will either take you away or give your more ideas. Reading is a great way to refresh the mind. Read something you really enjoy and see how it works for you.