This again will not only mean new players are likely to feel more welcome, but it should also help the team to play better too. If a person knows where they stand and what is expected of them, then chances are they will find it easier to relax and be themselves. Be open and honest with a new player about what they should be doing and get them feeling like a valuable part of the team as soon as you can. Let them have their say in team meetings to show that you value their thoughts and in turn help them to feel welcome from the start.
