do you use taste enhancers when cooking?

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I learned this trick from a neighbor who cooks very delicious foods. She said her secret is just a dose of taste enhancers like "Ginisa Mix," "Magic Sarap," or vitsin/Ajinomoto. We have learned that these taste enhancers are bad for the health, yet restaurants, fast foods and even many homes use this a lot in order to make their cooking delicious. Do you also use this? I admit that I use it but very sparingly. I just add a pinch to add flavor but I know of some who pour out all the contents of one sachet in one cooking. What's your secret in preparing delicious meals?