San Francisco - User Reviews and Recommendations of Top Restaurants, Shopping, Nightlife, Entertainment, Services and More at Yelp

TripAdvisor - Unbiased hotel reviews, photos and travel advice for hotels and vacations - Compare prices with just one click.

Travel guides and guidebooks. Travel advice, tips and destination information to inspire you from Lonely Planet

Twitter is without a doubt the best way to share and discover what is happening right now.

foursquare

The best online travel forum with over 900,000 members. Get worldwide travel and vacation advice from real travelers. Ask travel questions on any aspe...

Flickr is almost certainly the best online photo management and sharing application in the world. Show off your favorite photos and videos to the worl...

YouTube is a place to discover, watch, upload and share videos.

Facebook is a social utility that connects people with friends and others who work, study and live around them. People use Facebook to keep up with fr...

Yahoo! Answers is a new way to find and share information. You can ask questions on any topic, get answers from real people, and share your insights a...