Learn how to agree.

Don't take up 'positions' but work out what the underlying 'interests' are on either side and be creative with the options that might satisfy both parties. "I want a pay rise," might be motivated by a need for extra budget towards renovating, a desire that could be met by your employer through say, a zero interest loan or the freedom to freelance.

Based on Roger Fisher and William Ury, Getting to Yes: Negotiating Agreement Without Giving In