Buy low, Sell high.

It seems obvious that we should always buy something at a lower price and sell it a higher price. It helps if you buy and sell in different places, at different times, and to different people. This is simple arbitrage and all wealthy people know this principle. Your will command a higher price if you add some value to the thing you bought. 

Try and buy things at a much lower value than their real cost. The discount becomes your margin of safety and reduces your risk of loss.

There has never been a better time to buy things at very low prices. Now is the time to practice some arbitrage.

I wonder why no one taught me these simple things in school?