Entrepreneur -- Disagreements come in more ways than just saying "no." And if you are disagreeing with someone, you'll never close the sale.

Agreement is vital and is the single most important and violated rule of selling! I’m not saying you should mislead the customer. There’s an art to telling the customer, “I’d love to make that happen to you,” rather than, “I can’t,” “I won’t” or “That’s not my job.”

Here are seven things not to say in sales or business:

1. "That’s not my department."

You must take responsibility for everything, whether it’s in sales or your personal life. Don’t blame the economy, don’t blame other people, and don’t blame any external conditions, because blaming is something you do to become a slave.

Related: Avoid the Dead Zone By Adopting 'Recruit Daily or Perish'

The greats gave up the blame game long ago. They are big on accountability and responsibility to get the job done. If you are willing to take the credit when you win, be willing to take the credit when you lose.

2. "You can trust me."

Have you ever noticed when a buyer isn’t fully listening to you? This occurs because the prospect assumes that since you are a salesperson they cannot trust you. The media constantly runs broadcasts of scams and cons that make consumers skeptical of salespeople. Losing credibility will add time and this lack of trust from the prospect will cost you sales.

Saying “trust me” to a prospect isn’t going to build trust and may even have the opposite effect. To properly handle your buyers trust you must understand that people believe what they see, not what they hear.

Always, always show written material to support your presentation or proposal. Make sure to use third-party materials when collecting facts for your customer that support what you’re saying -- this adds external credibility to your claims. And you must write down everything you have said, offered, proposed, promised, suggested and implied during the proposal.

Read the rest of the story here: http://www.entrepreneur.com/article/244982