I have to agree with Brandiwynš¶ and Storm Machine. Brainstorming with a buddy is the #1 way I break through my block. Heck, I wouldn't even HAVE a plot idea right now if I hadn't talked it through with Happy Mumsy Year!! Mindmapping could work for you too. Don't be afraid to put good old fashioned pen to paper and write out any ideas you might have. No idea is too silly! Make a web and connect ideas id you're a visual person.