500 Days Of Summer.
Some blogs recently suggested that fiction titles were better sources of business advice than the traditional non-fiction tomes.
Accordingly I was going to recommend the new movie 500 Days of Summer as a guide to the futility of trying to match your product/service with people who are just not interested. But that's not why you go to movies, so I leave what you take from it up to you.
I'll simply recommend it highly and, in line with the impact of previous recommendations here, I expect its success further to confirm my influencer status.