By increasing supply of goods , and controlling the supply of money , i suppose
Don't buy anything that you consider to be too highly priced, and be sure to explain your reasoning to the seller.
2 factors... at present moment for you...<br />
-Control GDP with required balancing...<br />
-Grow GNP with atleast half or more than half ratio of average growth...
Control stocking and adopt direct marketing avoiding all middlemen.
You use fear. You put a gun on the head of the owner and say: "Lower the price!"- He'll lower - "Rise the price" - He'll rise it. That's pretty much how it works in every corner of mother Earth.