Final answer:
To initiate a three-point turn, begin by signaling with your left turn signal and checking for traffic to ensure safety before proceeding.
Step-by-step explanation:
The first thing to do when you make a three-point turn is signal with your left turn signal, then check carefully for traffic coming toward you. This safety measure ensures that other drivers are aware of your intention to make a turn and gives you a chance to assess the traffic to ensure it is safe to proceed with the maneuver. After signaling, make sure the road is clear in both directions and that you have enough space to perform the turn safely without impeding other traffic.