deal with fats

This probably provides more information that you really want, but reading it will give you a good understanding of fats, how our body uses them and how they affect our health.

http://www.hsph.harvard.edu/nutritionsource/what-should-you-eat/fats-full-story/index.html#the-bottom-line

As a basic general rule, avoid all trans fats, limit saturated fats and get plenty of unsaturated fats (both poly and mono), without going over in calories or neglecting other macro or micronutrients. Get as much fat from plant based sources as possible.