Evil Eye

Do not make yourself conspicuous by flaunting your intellect, deeds, or wealth. Don't display your good fortune in the presence of people who lack your assets. Conduct yourself in a way that others will neither become jealous nor begrudge your good fortune. Conversely, do not pay attention to the good things which others have. If you praise others, immediately add the blessing that the evil eye should have no dominance. There are a variety of antidotes to combat the evil eye... The best thing, however, is to pray to Hashem to save the people Israel from the evil eye and from all bad things. You need never fear the power of the evil eye when performing a mitzvah.

(Pele Yoetz)