I recently heard the astonishing statistic that since the beginning of
the 20th century more Americans have died in automobile accidents than
in ALL wars fought in US history put together. It got me wondering
what other activities in daily life (excluding high risk taking
activities like sky-diving) are considered to be the most risky? One
always hears that it's more dangerous to drive to the airport than to
get on an airplane, but has anyone documented a list of risk factors
in normal activities?  (let's assume that safe sex is a given, okay?)

Is this the same as a "what's the deadliest snake?" question? :) Which
criteria do you want? What kills the most people, or what activities
are you most likely to die from trying?

Leading Causes of Death, US 2001 http://www.cdc.gov/nchs/data/dvs/nvsr52_09p9.pdf

Interactive search: http://webapp.cdc.gov/sasweb/ncipc/leadcaus10.html

I am not a Google Answers Researcher. 

Source: Personal knowledge.