This is easy (I’m glad this challenge hasn’t been difficult for me so far!), straightforward and true. Best advice I ever received from my dad is: be honest. Not in a way where you have to tell the truth all the time, because I do agree that sometimes white lies need to be said, in an appropriate situation.
My dad has always told me that as long as I live my life honestly, that I don’t owe anyone anything, that I’m being real with myself, not living a lie.. these are fundamentals to a good life. I always try and apply this to my daily life.