Best (and easiest) ham ever:

Place, skin-side down, in a large pot with a lid:4 1/4-4 1/2 pound bone-in fresh ham
Add to the pot:
1 onion, peeled and cut in half
2-liter bottle of Coca-Cola

Bring to a boil, reduce to a brisk simmer and cover loosely. Simmer for about 2 hours, or figure roughly an hour for every two pounds if you have a bigger ham. ToastMom and I used a 9 1/2 pounder, and it seemed quite well-boiled after a little more than 4 hours.

When the ham is getting done, preheat the oven to 500 degrees. Take the ham out of the liquid and let cool slightly. Place the ham in a roasting pan and remove the skin. Score the layer of fat below in diamond shapes and stud each diamond with a clove. This should require:
A small handful of cloves

Drizzle/smear over:
1 heaping tablespoon molasses

Mix, then sprinkle over:
2 teaspoons English mustard powder
2 tablespoons brown sugar

Pop into the very hot oven, and cook for approximately 10 minutes, or until the fat no longer looks slimy and disgusting and the glaze browns and bubbles.