The main point in this instructable is to use small plastic drywall anchors to help secure the holder to the drywall. Without these anchors, the screws will tear-out from the wall leaving the heavy iron on your life-partner's foot- and angry words in your ears regarding your lack of craftsmanship.
This method can be adapted from using a very small anchor to hang a small picture, for example, to using big, honking metal anchors to secure a backyard deck to the concrete foundation wall of a house.
Step 1: Parts & Tools
Step 2: Position the Iron Caddy
Use the level to make it nice and level, then mark the points where the screws will attach it to the wall. Check your position again to make sure(yeah, measure twice cut once yadda, yadda, yadda but do it anyway).
It always makes the job easier to have a helper to mark the screw wholes and so on.
It also helps to have a camera operator when photographing an instructable!
Step 3: Drill the Holes
Usually the box the anchors came in will tell you the proper size of drill bit you need for the given anchors you bought. If you found the anchors at the bottom of your tool box, compare the end of a drill bits until you find a size that is slightly smaller than the diameter of the anchor(shown below).
Step 4: Set the Anchors
Step 5: Attach the Iron Caddy to the Wall
Place the the iron in the caddy, and feel the love from a grateful 'Squeeze'.(sorry no photos of that- try the "how to kiss" instructable)