Three new books bring help for acting on your good intentions.
The Idealist.org: Handbook to Building a Better World (Perigee) by Stephanie Land, based on the popular Web site, offers advice and motivation for how to choose an organization you'll love volunteering for.
The Lazy Environmentalist on a Budget: Save Money, Save Time, Save the Planet (Stewart, Tabori & Chang) by Josh Dorfman, based on the Sundance Channel series, is a guide to goods and services that are easy on your carbon footprint and your wallet.
Throw Out Fifty Things: Clear the Clutter, Find Your Life (Springboard) by Gail Blanke can help you straighten out everything from your junk drawer to your relationships — but throw out (or donate) another book before you bring it home.