Give more than you take
Here is the whole ethic in one line: give people a use-value greater than the cash-value you take from them. Whatever someone pays you — in money, time, or attention — they should walk away with more than they gave. This isn't charity; it's the most durable way to build anything.
Give a use-value greater than the price you take.
Does each person receive more value than they pay?
Find one exchange where you can quietly give more than expected.