When leaving the house:
Bismi'Llahi tawakkaltu 'ala 'Llah, Allahumma inni a'udhu bika an udilla aw udall, aw uzilla aw uzall, aw azlima aw uzlam, aw aj-hala aw yuj-hala 'alayy
In the name of Allah, I trust in Allah. O Allah I seek your protectoin from misleading and being mislead, from causing someone to slip or slipping, from oppressing and oppression, and from promoting folly and being foolish (Abu Dawud, Tirmidhi)
I think there are some muslim leaders around the world who need to start making this dua when they leave the house. I wonder how many people who make this dua when they leave the house actually think about the meaning of the words they are reciting, and strive to do what they are praying for?