Avoid fast food at all cost. Sure, there are certain things that you can eat from a fast food place, but all things considered, time spent anywhere near those places will generally wreck anyone's diet. It is important to note that you have everything you need to help you, rather than hinder you, without visiting a fast food restaurant. If you are looking to eat out somewhere, then you need to go to a sit down restaurant.
As previously stated, nutrition is about monitoring drink and food consumption for life. To live longer and be happier and healthier, good nutrition practices are a must. Utilize the information you've read to live long and much healthier.