Cheap Alternative to a Center Punch

When drilling flat surfaces drill bits tend to wander a bit. A center punch is be used to keep those wandering bits in check. What if you don't have a center punch you ask? Well here is a trick which uses common items laying around the shop. I used it while helping Tim with his truck rack and he said I should do an instructable for it. So recently while I was working on my own microwave transformer welder I found a perfect opportunity to snap a few pictures and write one up. Here we go.

You will need:
A Screw or a nail
A Hammer or other impact persuasion device
Something to drill

Determine where you want to drill your hole. Then place the tip of the screw at that point. Next hit the screw/nail on the head until you make a dent. Finally drill to your hearts content free from wandering bits*
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*Really big bits will need a pilot hole but what better way to make sure your pilot hole is dead on than with a dent.