First, read more. NET's Resource page lists a number of excellent websites that have a lot more information. The Insightful and Provocative page does as well. If you really want to get angry, start looking at The Wall on the November Coalition's page. Of course, I think Repeal.
NET is a great website too.
I encourage you to look at the Notable Critics page. It's worthwhile to see what all of these folks have to say. Second, tell other people. Tell everyone how you feel. If the topic comes up, tell people that prohibition doesn't work, that innocent people are being killed in the name of a policy that does not and cannot work.