I'll take search engines over hospitals any day. I cringe at anything that has to do with hospitals, needles, blood, or doctors (my father, girlfriend's father, and numerous others excluded). Still, five years after my previous checkup, I recently decided to go for an annual physical, where the doctor convinced me to do have some basic blood work done. Last week, I called for the results, and everything was fine - almost. My triglycerides were slightly high. Where could I turn for more information?

One conclusion I've reached on the click fraud problem--the dark side of online advertising," as last week's Business Week aptly dubbed it--is that the key to fighting click fraud lies in knowing how to target your customers.