I agree with pharmacist2013 the usual advice about exercise and diet.
There are statins that may be prescribed by your Doctor.
Olive leaf extract - read my recent hub has twice the strength of green tea and is supposed to be good for reducing cholesterol amongst many other things.
Cholesterol can unfortunately be hereditary, my 22 yr old slim, healthy sister has cholesterol levels similar to the average age of a 65yr old man.
Most importantly, whatever you decided to take traditional/complementary, homemade medicine, get your cholesterol levels checked regularly. Ensure that what you are taking is working.