Consume moderate (not low) quantities of good oils.  Avoid high fat meals.  Limit bad fats and oils to a small percentage of fat intake.  This can mostly be done by (nearly) eliminating
(a)   partially hydrogenated vegetable oils, which occur in many prepared products,
(b)   fats that are solid at room temperature.
Contrary to once popular belief, babies should also avoid diets high in saturated fats (SN 3/4/95 p.132).

Click for help on dealing with high fat meals and information on cardiovascular-cholesterol connections.