I have just returned from a week, taking a full time paper at Massey University, Palmerston North, on Negotiation Practices. The lecturer being the amazing Bruce Cottrill, has extensive experiences in mediating complex disputes in both the private and public sectors. He currently practices in mediation, conflict management, coaching and supervising mediators, having a wealth of knowlege that I have been lucky enough to be exposed to and learnt from.
The paper was attended by a number of vast business sectors, including the Police force, Ministry of Justice, Legal firms, Real estate brokers and many practicing Mediators & Arbitrators.  
I now have 2 assignments to submit, but the information I have taken away from this lecture is invaluable and I look forward to putting all my new skills into my everyday life negotiations. 
I recommend anyone to read "Getting to Yes, Negotiating an agreement without giving in" - Roger Fisher and William Ury. 
They put forward the theory of Intergrative Negotiation (or collaborative) practices versus Distributive Negotiation (Positional) to achieve a more favourable outcome for both parties.