Drills probably need no introduction. If you haven't ever used one, it is safe to assume you know their used and purpose. However, it is worth appreciating their existence. Drilling and driving fasteners was very monotonous before the advent of the electric drill.
There's technically two different tools here; there are drills, and there drivers. They are both 'drills', however drills are primarily used for boring (making holes), while impact drivers actually have a hammering mechanism that helps drive screws into material. You can get away with just a drill at home, but if you're investing in a drill go ahead and spoil yourself and get a drill / driver combo set.
Ensure that the drill bit is fully secured in the chuck before beginning drilling.
Apply a straight and steady pressure on the drill motor. Do not ram or weave. The practice breaks the twist drill bits and may cause injury to the operator.
Ease up on the feed pressure as the drill or bit emerges from the work.
Understand where the drill bit will emerge from the material and take special precautions. Keep hand and body away from that area and off the workbench.
Drills should be used for the removal of material (drilling), impact drivers should be used for driving fasteners (screws).
Always use the correct driver bit for the corresponding screw head.
Maintain firm downward pressure when drilling or diving.
Return all drills/drivers when finished, ensure all batteries are properly connected to the charger.