philforest: For me it is simple: I have saved myself hours (if not days) of time and myself AND my company thousands of dollars from the advice and tips I've read here. So its worth my investment of time.
But, having said that, my commute varies in the morning anywhere from as short as 15 mintues to as long as an hour, so I spend time here only when I get in early (of course, I sometimes find myself leaving a little earlier when I've got a trip coming up)...
Also, as the Catman said, read only those threads which seem to be of interest (although, I have found, this can be deceptive because we all seem to like the tangents we go off on...)