Never try to sell Tribbles on the same planet twice. Never sell a Klingon a bat'leth and turn your back. The writer's signature on the book costs nothing but increases its value. A tribble in the hand is worth 1,657,492 in the bush. Money isn't everything.
Residual income is.
Lobes equal latinum. When in doubt, over-charge. In case of crisis, break employees. Holographic customers bring only holographic profits. Patriotism is always for sale.