There is a tendency to focus on your own time pressures rather than on the pressures the other side also has. It could be that you have common time pressures, or that your time pressure is actually transferred to the other side because if you don't come to an agreement before time is up, they also lose out on the opportunity to make a deal. Be careful as the deadline approaches. Negotiators tend to make more concessions and bigger concessions the closer the deadline. If you find time pressures working against you, find out what can be done to relieve the time pressure. Many time pressures are self-imposed.