How can I use a drill bit to countersink screws effectively?

To countersink screws effectively using a drill bit, follow these steps:

1. Choose a drill bit that matches the size of the screw head.
2. Drill a pilot hole for the screw.
3. Switch to a countersink bit and drill a wider hole around the pilot hole to create a recess for the screw head.
4. Insert the screw into the countersunk hole.