Have you seen any of Dave Feldman's stuff? You might want to just not do any fasting for the three or four days leading into the cholesterol test. Fasting does tend to raise cholesterol, but it's a temporary thing.

If you're brave, you might try eating a little extra, especially fat, leading into the test, again based on Feldman's observations.

I think in the states you can get your cholesterol checked at a lab, and your doctor never really needs to know the number--probably helpful if the number that shows up in the doctor's office matters for insurance purposes etc.