Quote Originally Posted by Throbert McGee View Post
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And in Russian, it sounds much better if you use the infinitive in this context. I would possibly translate the sentence as:

Важно питаться хорошей едой.
(It's important to feed on good food.)

As far as I know, кушать хорошую еду/пищу would also be possible, but питаться + instrumental ("to feed upon, to nourish oneself with") better emphasizes that you're making a general statement about nutrition.
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I can't explain the grammar rules, but I would say a bit differently:
Большое значение имеет правильное питание.
Важно хорошо питаться.