Biggest change for me has been editing myself a lot. Not using phrases like "I want to", "I'm trying to" and "I'd like to" and just say what I'm doing, what is required, what I expect. So not "I'd like to practice once a week", but "must be able to practice at least once a week". I need to do more of that verbally in my life, especially at band practice. I have a tendency to disclaim everything I say before I say it, which I realize is confusing as hell if you're not already in my head and know what I'm about to say. It makes for really ineffective communication.
Guilty of that myself.