Keep a weapon in hand, it intimidates your buyers. Never put women in front of business, but a little oo-mox break never hurt anyone. A bar of Latinum a day keeps poverty at bay. The way to a female's heart is through your cash purse. The needs of the many are outweighed by the need for profit.
Government contracts are good.
A smart customer is a dangerous one. Never be afraid of the size of another man's lobes. A negotiation with a Ferengi only ends when the other yelds. If you can't beat them, cheat them. Always negotiate up in your favor, and down in theirs.