Although I think it's important for each of us to make up our own minds about who to vote for in November, few of us really have the time (and/or inclination) to learn every relevant factor about our voting options. A convenient shortcut is to find one or more groups that we agree with and look at their scorecards for the candidates in question. Along those lines, I'm including the scores from a few groups and encourage commenters to include those I've omitted.

League of conservation voters (lifetime): Obama: 96, McCain: 26
LCV (110th): Obama: 100, McCain: 29
NARAL: Obama: 100, McCain: 0
Planned Parenthood: Obama: 100, McCain: 0
National Right to Life: Obama: 0, McCain: 82
ACLU (lifetime): Obama: 82, McCain: 25
ACLU (110th): Obama: 89, McCain: 17
NRA: Obama: F, McCain: C
NAACP: Obama: 100, McCain: 7
NOW: Obama: 91, McCain: 13
Children's Defense Fund: Obama: 100, McCain: 10
National Education Association: Obama: 100, McCain: 0
National Farmer's Union: Obama: 100, McCain: 0
AFL-CIO: Obama: 93, McCain: 7
United Auto Workers: Obama: 85, McCain: 9

Note: Presumably most of TPM will be voting for Obama in November. This information is intended not just for your consumption, but also for sharing with your friends and family.