Yo Tad,
Try this one, I spent many hours rounding one bouy.
Approach from windward set up for leeward mark roundings from various angles. ALWAYS concentrating on enter wide and leave tight.
Sail upwind a couple hundred yards and tack 3 times and do it again.
Do this at least 10 times every time you are out.
If in a spin boat give yourself room to set your chute for the DW approach.
Peace out