a couple of suggestions based on my experiences:
1) setup a separate tank/bucket/pool to hold corals as you move rock around so you don't damage them
2) don't expect this to be a quick thing....it takes time to place/stack/arrange rock to your liking
3) don't be afraid to clip corals off the rock to move around....it feels wrong, but they often do better once moved
4) consider aesthetics, flow, light, and area for corals to be placed
5) inventory what you have so you don't lose things in moving them around
6) group corals by light/flow demands
7) blowing air into the intake of a pump will help you visualize the flow patterns in the tank
8) gloves can be a real help when moving rock. I have had multiple cuts and stings when moving rock in the past. I now use the nytrile gloves...no need for an infection
9) have some water ready for a water change as you are going to stir up all kinds of crap and you will need the water change. Plus some water will be lost to your floor and clothing.
10) take your time
11) have some pictures for inspiration if you are going for a certain look. It will make it easier to achieve.
-Reed