How to protect ourselves from the evil eye?

The best way to protect yourself from evil eye, from hasad, from jealousy, from the jinn, from shayateen is the morning and evening adhkar. This is what the Prophet has told us and in Sahih Bukhari the way we do that is we would recite ayatul kursi for example, the three quls three times each and you'll do this after you've prayed fajr before sunrise and also after you've prayed asr before maghrib time starts. If you happen to forget you can always do it at a later point in time. There are other adhkar that are also more helpful. There are present a number of books or apps for example fortification of the muslim, fortress of the muslim so you can check those out as well.