Go to the party websites. Spend, seriously, 10 or 15 minutes there, reading what they're about. Thats half an hour out of your day, and I will guarantee that you are more informed than a scary percentage of the American voting public. There are very, very few people who are actually fully aware of the issues - they either vote one way out of habit or family tradition, or based on 30 second sound bites. Neither are particularly informative.
30 minutes of your time isn't too much to ask.