If you're wearing a themed sweater - say, one with a particularly holiday-worthy pattern or a cartoon character - you might choose to wear that to a party to drum up some laughs or start some conversations.
Cold calling can be an effective way to drum up interest in your service, but be prepared to have to make a number of calls before you find a company interested in discussing the matter further.
There's always someone celebrating something, so you're sure to drum up business if your services are good.
Placing meaning behind a task such as letter writing can help drum up the passion and motivation you may be lacking for the cause you are currently trying to write about.
Allying yourself with a nationally recognized organization will not only help your group drum up support, but it will usually also allow you to raise the most money.