Invent a new product. Who says you have to be sitting on the "think tank" in order to think? You can use a traffic jam.
Think of 5 ways to kill your boss-he's the one hampering your productivity, right? (We didn't promise that it would be good for you-only for the country)
Throw apples at the passersby..the demand for apples will directly go up..you can also choose tomatoes, if they are selling at 100 bucks a kilo.
Honk until your battery goes dead..demand for car towing services will increase, and therefore,....
Order a takeaway pizza and desrcibe your location as the ---- jam..he'll understand, he'll deliver..you have managed to contribute your mite to mitigate the unemployment problem.
Write a resume/autobiography/poem/..circulate them to the other people in the jam.you may get lucky and find a publisher among them..or an employer..