Article too short and not really relevant given majority of population now work from home.   

This article provides great guidance in advance of negotiations. Knowing your variables and positions in advance will help achieve the desired win win result.

Take a colleague with you as a sounding board and to retain perspective is very true

Good points and tips raised; 
Set negotiation variables
Know whom you are negotiating with
Set agenda

During negotiation
watch body language
take a colleague
Don't accept unrealistic deadlines
show enthusiasm
aim for a win/win outcome

This article has taught me that thorough preparation and listening are key for successful negotiations. Negotiations can help an organisation cut costs, increase profits and on a personal level can help an individual to earn more, have more free time and build better relationships.

Before a negotiation it is important to calculate different variables, such as target price and walkaway price. I believe that I could negotiate better as I would improve preparation.