“Ever wish you had a tool that could prove your suspicions were valid?” Bluewater Security Professionals asks on its Web site (bluewatersecurityprofessionals.com). "Next time you sense suspicious activity with your vehicle, make sure (the $435 PTS Tracking System) goes along for the ride. The site includes “hints” on where to put the GPS antenna—mostly in places where it wouldn't be seen. But forewarned is forearmed: Here are some of the spots where a GPS unit is likely to be stashed.

They fell for each other in grade school, in the sweetest of ways. In fifth-grade music class, she played saxophone; he played the snare drum. In high school biology, she held the frog while he wielded the scalpel. It was the sort of love story immortalized endlessly in romance novels and Top 40 long-distance dedications. “I thought when I married him it really would be ’till death do us part,’ ” she says now, still surprised that the marriage ended after 19 years. Ultimately, the romance had sputtered to a close, as so many love stories do.

Everything I needed to stalk myself, I bought on the Internet for 65 bucks. I started with a Google search—instant background checks—and hit the first link it returned, people data.com. I entered my credit card info, and the next day