Just as you feed your body system with food on a daily basis, also ensure you feed your mind system with positive and needful informations in the same manner.
However, this would ensure the healthy growth of your mind alongside your body system.
Now, think of the world most successful people you may know, you would notice they are well informed.
Don't be ignorant, be informed.
Go as far as you can to acquire that information. Be updated, be relevant.