"Honesty is best policy", "do unto others etc." I think has paid off for me.
Recall a client that insisted on a fixed price for a job but another client gave me 'heads up' that the 'client' was a lawyer wanting to entrap me into an impossible job that would have been a very costly disaster.
More than a few times I had 'heads up' from satisfied clients that forewarned me.
OK, I never got rich (comfortable enough) but I can sleep at night.
I met many very influential folks over time but refused to name drop for advantage.
I took a 'hobby' business to the level of 'over a million+$'s', employed a dozen good guys and contracted with governments and many big name firms.
Recall a gov't agency wanting me to design an electronic device and I simply told them it was 'off the shelf' available. As a result they went to tender for a large quantity of said item but added me as 'sole supplier'. LOL.
Another time I made a suggestion that saved the gov't tons of $$'s. Result was a nice big contract and, unbeknown to me, a recommendation to ICAO to buy my product.
Even the Canadian air force had to purchase my product.
Oh, never got rich but always enjoyed the challenges of satisfying my clients needs.
Over my career I met many CEO's, Prime Ministers, diplomats, Politian's and (a-holes).
You sure learn real fast to read a character.
One that will always stay with me is a CEO that had a modest chauffeured older station wagon (that came back after we serviced his aircraft) to show me his presentation matched pair of priceless shot guns that his wife had gifted him. Now that was a simple friendly follow up visit.
He was a founding member of 'Ducks Unlimited'!