bar the obvious like low fat intake, drugs and excercise?
Choose better parents in the first place. This is the best means of all.
Diet and exercise will only help to a very limited extent. The greatest determinant by far of your cholesterol level is your genetic make-up, not your intake or activity level. If you really have a very high cholesterol level, drugs are your only realistic option.
There is some speculation that part of the protective effect of lowering cholesterol when it comes to heart attacks and what have you is not actually conferred by the lower cholesterol itself, but rather by the drugs which lower it. But that's by the by.
QDM