Enter the nailshroom. This is a dumbell shaped device, with the "cap" of the top and bottom mushrooms flat. In the center of the far cap is a hole which fits down around the nail. The device is then placed flat against the wood. This flat cap of the nailshroom is cushioned with rubber. On the near side, a small metal cylinder protrudes from the center flat nailshroom cap. Perhaps a bullseye is drawn around it. On striking this cylinder, it travels down through the shroom, hits the nail, then is springloaded to return back and receive another hit. The nailshroom is held firmly in place with a fist around the middle section.

The nailshroom hits square every time. Even a clean miss with the hammer will just hit the broad flat top of the nailshroom and no damage will be done to project or hand. Glancing blows may send the center cylinder down with less force, but it will still hit the nail squarely. Hide the nailshroom and no-one will know its wasn't done by a pro!

(that last line will be used in the infomercial.)