Don't lie to me
What you do speaks so loud that others will have a hard time hearing what you say. So practice what you preach or don’t preach at all – walk the talk. And remember that there is often a major gap between what someone says and what they do. Characterize people by their actions and you will never be fooled by their words.
I noticed this. I used to pick my friends by what they said. But now I think it is more important to look at what they do (which can involve speaking lol). One friend comes downstairs to see what's wrong, and texts me for hours when I am upset. The other criticizes me a lot and ditches me when I am going through a hard time. They both say they are nice.... but only one is.