How to lower cholesterol

I had a health checkup recently, and my cholesterol came out to 245.

The numbers were a bit high to begin with, but... since they came out a bit high, I was told it would be a good idea to get a prescription.

Now that I've heard about it, I've gotten the medication, but since it seems to be caused by my habits, I'm planning to improve my diet and exercise. Are there any ways that would be helpful?