Be aware of what you say you will do. And then do that thing with a robustness that makes sense to you and would make sense to anyone that you would bother to explain it to; your intentions to do this thing right and well.
The trick is not to explain it to anyone at all, to just do it; first this thing, then that one, then the next one until you get in the habit of doing the literal best you are able in all tasks that you endeavor upon.
Treat your daily with a reverence that you would a child that you love or an elder that you’ve respected in this life and would undoubtedly give your best efforts on the behalf of.
Soon enough you will become a beacon for those whom you interact with.
And it, this forthrightness, will become the (much needed) norm for the whole of the human race.