If I had a surefire way, I'd definitely share, and then use it myself. At the moment, I'm having terrible lack of mojo, also...
Some things that help me are browsing the gallery and scraplifting a style I'm not used to, getting a new template or kit I'm in love with, taking a new photo that I want to scrapbook, or trying a challenge (if you've already done the Think Outside the Box challenge, all of the Pinterest boards are still live and provide a TON of inspiration and challenges. Even if you won't earn points for them, they're a great source of inspiration and ideas to try something new).