Points of information are very important. You should offer points of information as often as you can, during all four speeches on the other side. Judges will penalise debaters who offer no information during the round. During your speech, it is important to take two or three points from the other side. You should not take more than four points, even though your opponents will try their best to offer more.
Teamwork is also very important.
The 1P and 1O particularly should divide their analysis into two parts. You should try to be creative when making allocations whenever possible. Of course, the second speaker should refute the other side and reaffirm the first speaker's analysis. However, he or she should spend most of the speech developping his or her own allocated material. The last speaker for each side should not introduce completely new material.