One of the best things you can say when you leave your home or step outside anywhere is mentioned in the following hadith:
The Prophet said: If a man goes out of his house and says: بِسْمِ اللهِ ، تَوَكَّلْـتُ عَلى اللهِ وَلا حَوْلَ وَلا قُـوَّةَ إِلاّ بِالله.
Bismillaahi, tawakkaltu `alaa-llaahi, wa laa hawla wa laa quwwata illaa billaah – in the name of Allah, I put my trust in Allah, and there is no help and no strength except in Allah- it will be said to him: this will take care of you, you are guided, you have what you need and you are protected. The shaytan will stay away from him, and another shaytan will say to him: what can you do with a man who is guided, provided for and protected? [Abu Dawood, At-Tirmidhi]
Subhan’Allah, what a beautiful hadith which demonstrates the power of Allah’s words as being enough for you against Shaytaan.
Remember that Shaytaan wants to misguide you in every way possible – so protect yourself as much as possible by remembering this easy dua!