I’m a huge fan of what I call "mind jogs": tools that serve as ‘hacks’ to stimulate creative thinking and get me out of my rut. I even keep a folder full of them on my browser toolbar (like the online version of The Creative Whack Pack, a wiki with one guy’s summaries of great books he’s read and NOTCOT.org, a really visual site chock full of great, current design coolios).
Add to that the Concept Trigger from AdCracker. It’s a (free) collection of illustrated quotes on branding and marketing collected from consumers all over the world, collated and Flash-i-fied by Steve McNamara, publisher of an interesting item called AdCracker CD.
Worth a spin if you find yourself stuck. (Via Colin Brands’s Building Brands newsletter.)