One of the things I impress upon people is what never to do, and what TO do, if they suspect they're being followed on foot or by car.Don't be oblivious to your surroundings. Observe everything 50-100 feet around the perimeter of your body as you move from point A to point B. Note anything that seems out of place, like a car that's taking all the same turns you are. A pedestrian following you may veer off at a side street, then re-emerge to catch up with you. Slow down. If you're walking, stop and fiddle with a shoelace (while being aware). Who also slows down or suddenly stops? Speeding up might cause an amateur to also speed up, but a pro will not make this conspicuous change unless you're about to make a blind turn. Call the police. Let the police handle the situation. If you get off a main road, head to the nearest police station. If no-one is around, go to a people-filled public spot. Have a seat, have a soda, and observe your follower for any details. Stay cool. Don't speed or drive carelessly. If you're being followed by a chain of pros, they'll be all along your route, so speeding won't help. If you suspect the follower is a road rager, stay on main roads, drive to a police station. Confuse the follower. E.g., exit, then get back on the road you got off. If someone behind you duplicates this behavior, you know something's not right. Or, make multiple turns in the same direction and see if your follower does the same. Alter routes. Take different ways to drive home from work.
If you suspect you're being followed, follow the above guidelines and make getting to a safe spot a priority.