Fellow college students - Ask your professors if you can have 2 minutes at the beginning or end of class to ask your classmates to vote by text message. Most college students have cell phones and a texting plan, and it only takes a minute to explain why they are voting, then you can write the two numbers on the board (text 104058 to 73774). A quick and easy way to get a bunch of votes (I got all four of my classes to vote).
High school students - I'd suggest the same thing, but some schools get a little uppity about cell phones in school
~Allison