Sources of Power in a negotiation situation

information, knowledge, expertise
money, control over resources, rewards
legitimate power (authority, reputation, performance)
support of others
organizational position
personal power (persuasion, friendliness, praise, integrity, patience and tenacity)
sanctions
threat of retaliation
monopoly
physical power, force
creativity, elegant solution
commitment
moral authority; charisma
good BATNA
relationship
ability to strategize