The way I remember it for CatII ops is 4A's, a B and a C:
Aircraft? (is a/c CatII capable, autopilot serviceable, everyone sat as they should be, lights set as appropriate?)
Aircrew? (Both crew CatII current?)
Airfield? (Airfield have a serviceable CatII ILS, LVPs in force? Wx?)
Alternate? (Airfield above CatI minima, weather?)
Brief the plate as you usually would, making sure the other guy is aware of the DH and Vis needed, Cat I reversion, and LVP runway exits / taxi routes.
Finally, review the
Calls that you will make, and what you are expecting from the other guy, including the actions after a go-around, and who is PF/PNF at which point.
Now, this is for turboprop Cat II, but might be a starting point for your needs? I feel a mnemonic helps you to remember everything you need to, especially when you are still learning.
Good luck!
TTR