For small disagreements, excessive preparation can be counter-productive because it takes time that is better used elsewhere. It can also be seen as manipulative because, just as it strengthens your position, it can weaken the other person's.
However, if you need to resolve a major disagreement, then make sure you prepare thoroughly. Using our free worksheet, think through the following points before you start negotiating:
Goals: what do you want to get out of the negotiation? What do you think the other person wants?
Alternatives: if you don't reach agreement with the other person, what alternatives do you have? Are these good or bad? How much does it matter if you do not reach agreement? Does failure to reach an agreement cut you out of future opportunities? And what alternatives might the other person have?
Relationships: what is the history of the relationship? Could or should this history impact the negotiation? Will there be any hidden issues that may influence the negotiation? How will you handle these?
Expected outcomes: what outcome will people be expecting from this negotiation? What has the outcome been in the past, and what precedents have been set?
The consequences: what are the consequences for you of winning or losing this negotiation? What are the consequences for the other person?
Power: who has what power in the relationship? Who controls resources? Who stands to lose the most if agreement isn't reached? What power does the other person have to deliver what you hope for?
Possible solutions: based on all of the considerations, what possible compromises might there be?
