Sites that search

Restaurant search: Dazhong Dianping (www.dianping.com)
Good for finding photos, addresses and phone numbers, and opinions on restaurants around China. But only great if you have some ability to read Chinese – or someone to help you. You can get your concierge to bring up your restaurant of choice on the site in your phone, which you can then show to a taxi driver.
Google alternative: Baidu (www.baidu.com)
Google alternative: Bing (cn.bing.com)

Language

Learn Chinese: ChinesePod (www.chinesepod.com/)
Online dictionary:
Line Dict (ce.linedict.com/dict.html#/cnen/home)
Online dictionary:
MDBG (www.mdbg.net/chindict/chindict.php)

Hospitals & health

Comprehensive international hospital: Oasis International Hospital (www.oasishealth.cn)
Comprehensive international hospital:
Beijing United Family Healthcare (beijing.ufh.com.cn)
Emergency clinic & pharmacy:
International SOS (www.internationalsos.com/clinicsinchina/en/Beijing.aspx)
Health information: MyHealth Beijing (www.myhealthbeijing.com)

Social information

Lifestyle magazine: The Beijinger (www.thebeijinger.com)
An English-language magazine by expats for Westerners
Lifestyle magazine: City Weekend (www.cityweekend.com.cn/beijing/)
An English-language magazine by expats for Westerners
Lifestyle magazine: Timeout (www.timeoutbeijing.com)
An English-language magazine by expats for Westerners