Surveillance is a necessary -- and oftentimes painfully boring -- part of the P.I. job. So you might want to do something to entertain yourself on the long slog. Something like, say, keeping a video journal of your investigation to aid in writing the book you know will be a best-seller someday?
Join Des Courtney as he keeps his eyes and ears peeled to catch a thief while giving a few helpful hints about how to survive a gig sitting in a van waiting for something, anything, to happen that will make or break his case.