I settled on the silver reflective plastic numbers since 1) they were cheap (99 cents each) and 2) they were grey, which matches the paint and stone around the front door. I could have painted numbers on the front door, but that would have required HOA approval. Because I only nailed these up they are not considered "permanent" and I could forge ahead without a whole lot of nonsensical paperwork.
To get started, I taped the numbers up exactly where I wanted them to go. Since I have a love for wreaths (for all seasons) I decided to keep them low so they would remain visible if anything was hung on the door.
If this had been a wooden door, at this point I could have just nailed them up and called it a day, but instead I have a steel exterior door which required a few more steps. The first thing I did was use a nail and hammer to gently tap marks into the door where the nails were supposed to go:
I then took the numbers down and was left with four indentations indicating the proper nail placement
BRING ON THE POWER TOOLS! I used my smallest drill bit to puncture the steel coating of the door. (Don't drill too far, since you do actually want to drive the nail in, you just are making a hole in the steel.)
Hold up the numbers and drive the nails into the door:
Beautiful! And now no more confusion!
Without a doubt you know you have found THE MONEY PIT!