Not so long ago, apparently, that answer would have been: surfing for porn.
However, according to a recent story in Reuters, social networking sites are now the most popular online pastime. Internet search guru Bill Tancer, who makes a living by analyzing hits, claims that in the past decade, porn searches have dropped 10 full percentage points (to 10 percent of total searches).
I say, overall, this is a good trend. For, even though social networking -- a la Facebook or MySpace -- at its heart really is an "All About Me" activity (just as porn is!), it's still way healthier to connect with others in this manner on a regular basis. After all, these are people you actually know, not some impossibly unrealistic fantasy!