Basic's about business-;

Once you know you're in a negotiating situation, you need to gather information about the other side's offer and use it to refine your own.
Many negotiations come unstuck simply because one side or the other doesn't listen. Negotiations often evoke a variety of emotions, especially fear and anger. Emotions can cause intense and even irrational behaviour and can cause conflicts. Salespersons should be very clear about their thoughts as it increases their chance of negotiation success and making a sale.
As the saying is “Some of the greatest battles will be fought within the silent chambers of your own soul.” In the same way, salespersons should first try to win the battle against their defeatist thoughts by becoming clear on desired outcomes.

How understanding is important in business-;

A Brain seems to be a cacophony attempting to grasp and understanding everything. It loves to have alternatives so that the best one can be chosen. It will reduce your anxiety which leads to enhance salesperson's confidence helps them to acquire business more confidently.
Salesperson's used methods to negotiate the resistance of potential customers till they end up on why they should do business together!!
Successful negotiations requires two parties to come together and discuss an agreement instead of assuming that a potential customer will say yes for everything. It is not necessary for the prospect to go for lucrative orders or contracts in the first instance, they may opt to take a smaller order. Salespersons have one of the hardest jobs as they have to deal with rejections on a daily basis. 
For the salespersons, initial stage or Door to Door can be the profitable opportunity in the future from long term point. Even a small win can pave the way for the successful work for bigger projects as opportunities don't happen, you create them. If you will not give up on something it will lead you to achieve greater results.
                                              We all have two ears one mouth for a reason, in the same way, salespeople also have two ears and one mouth for a reason. People just love to be listened to rather than speaking. If salespersons have effective communication skills it will be a plus point for them as compared to those sales professionals who push too hard. Active listening in sales is very important. While negotiating they should repeat one or more points the customer makes, it is very important to create a strong relationship with them. When sales professional learns to speak the language of the customer it will help them in understanding their demands in a clearer way to outwit the competition

Identifying potential customer is very important-;

In a negotiation process, it is very important to identify the potential customer as a partner as they are capable of becoming a purchaser of products or services from an organization. Determine the specific benefits your customer is seeking in buying your product. It brings more confidence in the sales professional's negotiation. 
It changes the whole concept and creates a communication gap basically, based on agreement. If the potential customer is not inclined to come to an agreement then the sales professional can close the offer period to shock the customer and then they reconceptualize and returns to negotiate for the salesperson's offer. There is a thin line between respect and fear.
It is important for the salespersons to walk a mile in their customer's shoes in order to see the big picture of the potential customer's demands, strengths, and weaknesses for the positive psychological environment for negotiation. Potential customers should feel connected to the negotiations because their viewpoints will acts as a basis for a long way towards making a favourable impression and building trust. Trust comes when you understand your customer's needs, respect them, and offer relevant service.

Winning your customer's needs-;

A customer should feel confident otherwise it will block effective negotiation, feeling of defensiveness i.e, lack of openness to new information should not exist. Salespersons should not forcefully enter their way into a deal. It is the prima-facie duty of the salesperson's to refrain from criticizing the needs, demands, motives, or behaviours of the potential customer. He/She should be modish, calm, and must be focussed and fair enough while mediating discussions about the numbers in order to not to settle for less than what is desired.

Negotiation is an important part-;

In negotiation, the thoughts of the other party are manipulated or you can also say it is a manipulation process. It is very useful to have a useful strategy to stimulate indifference, once the negotiation reached a sticking point. If the sales professional senses the potential customer's desperation or neediness the salesperson becomes prey to take advantage of. Sales professional creates psychological tension in the other party who seems to be relaxed or asking for a delay, this can result in an agreement. 
                         Therefore you can say Negotiation is a psychological process where the salespersons affect the minds of potential customers through their own thoughts and emotion. A salesperson should be the master of his or her own thoughts. The more salespersons empathize with the prospective customers, the more they will be able to anticipate what their customers will do next. The best salespersons should be able to think on their feet, and quickly adapt to any curveballs their prospective clients throw at them!! 
A knowledgeable salesperson with all the relevant information he or she can keep their expectation under control. The basis of the long term partnership is the trust between the parties. In this way a successful negotiation is not about getting to 'yes', it's about mastering 'no' and understanding the path to an agreement, the win-win mindset is not always beneficial in sales negotiations.