Voting
Los Angeles County
LA County Registrar-Recorder: Polling places, sample ballots, voting statistics, etc.
California
California Voter Guide Official Voter Information Guide
Tools
PolitiFact.com Pulitzer Prize-winning project operated by the Tampa Bay Times, in which reporters fact-check statements by government officials, lobbyists, and "anyone else who speaks up in American politics."
Voting Guides
League of Women Voters: Non-partisan voting guide.