What are six common pitfalls in negotiations?

Stanford has a good article on the common problems in negotiations and what we can do about them. The six pitfalls are:

1. Poor planning
2. Thinking the pie is fixed
3. Failing to pay attention to your opponent (The example they use is framing.)
4. Assuming that cross-cultural negotiations are just like âlocalâ negotiations
5. Paying too much attention to anchors
6. Caving in too quickly
7. Donât Gloat