If working out comprises one side of a coin, nutrition occupies the other. If one or the other suffers, proper fitness becomes difficult. For this reason, it is important to have a plan when it comes to nutrition, just as it is important to have a plan for hitting the gym.
A great article on determining your own nutrition plan based upon your fitness goals is linked here: https://www.bodybuilding.com/content/macro-math-3-keys-to-dialing-in-your-macro-ratios.html
Since each individual is different in body shape, size, fitness and health background, it is important that a nutrition plan be designed specifically for the person. If you are interested in learning more about my own personal eating plan, you can connect with me on the contact page of my blog!
*I am not a certified trainer, nor do I claim expertise. The above post is a collection of my personal observations, from which you can hopefully benefit.