Take a peek

I think it's the easiest methodology ever, and the one we most often forget.
Before you start drawing anything, even before sketching, and I would even argue even before thinking... do your research, do a little competitive analysis, look at what has been done in the field. What is the common solution for that. What are the design patterns mostly used for that. Take a look. Look around.
After that, start thinking, and make sure your solution is equal or better than that.
Easy right? ;)