Iraqis use internet to survive war
One tip - on the Iraq League site, one of the best known - is for people to draw up maps of their local area using Google Earth's detailed imagery of Baghdad so they can work out escape routes and routes to block.
As the communal bloodshed has worsened, some Iraqis have set up advice websites to help others avoid the death squads.
Google is playing an unlikely role in the Iraq war. Its online satellite map of the world, Google Earth, is being used to help people survive sectarian violence in Baghdad.
Consulting Google Earth can help people work out routes to avoid
It's another example of the central role technology plays in the conflict - with the widespread use of mobile phones, satellite television as well as the internet - by all sides and for many purposes.
For some time now, vigilante-style guard forces have been operating in many neighbourhoods, especially in Sunni areas targeted by Shia militias.
Many Sunnis see the Shia-dominated police forces as just as much of a threat, because of evidence of their involvement in kidnappings.