The U.S. Marijuana Party writes in that they now have chapters in 25 states. If your state doesn't have one, they'll help you start one. From the site's goal statement:

The goal of forming a Marijuana Party in your state is to become the king-maker in your state election. It is not to actually win any seats in your state house of representatives or senate. Although if you could pull this off your job is definitely well done.

....One of the easiest and least expensive ways to challenge the system is run a Marijuana Party candidate for governor of your state. But the best scenario is to run a full slate of candidates for your state senate or house of reps.

Why? Because in many electoral districts the margin of victory is very narrow, often down to hundreds of votes. Never forget that President Bush won by about 450 votes in one state. This is a lesson about the power of 450 votes. If you get only 1000 votes average for each electoral district in your state, chances are very good that you will cost 10% of the present state legislators their jobs.

The website also has an online tv page where you can watch videos. If this is your issue, go visit.