4. Missing Those 'Losing' Signals

In order to make the best use of his or her time, a salesperson needs to recognize losing signals as soon as possible.

When a customer stops bringing you problems and complaints, that customer probably will stop buying from you. Eventually, you realize there's a slippage issue. Red-flag warning signs include unreturned phone calls, canceled meetings and not getting any inside information. When these things happen, it is likely you are losing the deal.