I agree that choosing the right project team is a very important part of the project initiation phase. However, in almost any team, there will probably be a few team members who do not get along very well. From my experience I have found that the best way to handle situations like this is to get to know your team members on more of a personal level. For example, go out to lunch together and talk about things that are not related to work. This tends to produce a more friendly team atmosphere, and boosts the morale of the entire team. It is important for each team member to strive to form a cohesive team, as that in itself will enhance the efficiency of the project execution.