"eat right and workout."

I read today :

If you want to lose weight, you need to "eat right and workout." There you have it ladies and gentlemen, the 4 simple words. Eat right and workout! That's it! That is ALL that works!! EVERYTHING else is USELESS! If weight loss and losing weight is your goal, then you just need to eat right and workout and THAT'S IT!!!!

I looking for exactly this one.
It is means for me:

1.Less eat
2.What to eat
3.Fyzical exercises

How can I do it?