Plenty of porridge
Exercise.
Abstention from junk food.
And yes, a stress free life. Evidently if you are under stress your liver generates heaps more cholesterol (or something to that effect). The liver generates a heap of cholesterol over and above any that we eat.

Lloyds pharmacy will do a cholesterol check for you. Or your GP.

I had mine done before christmas and it was normal, I am pleased to say.