Short piece on how to tell if you're being followed.
If you must check for surveillance, don't keep glancing over your shoulder. Appearing to suspect you're being followed suggests you're doing something to merit it. Anyway, if you're being tailed by a serious outfit they won't only be behind you, but ahead and to the side as well; there won't just be one or two people on your case, but a whole team, with others in reserve. Maybe the whole street is following you.
I read a lot of Tom Clancy in high school and some of my favorite parts were the descriptions of how surveillance worked.
