Most likely, some colleagues will seem interesting and intelligent people, while others may irritate even for no apparent reason. Try to be friendly and affectionate as with the first, and with the latter. Do not enter into discussions or stand on the sides, if conflict erupted between colleagues. Even if you're used to the role of peacemaker, you can take it later, when well acquainted with the team and understand the intricacies of relationships between people in it.
In the first days or even weeks more and watch less isolated. Be polite with all the same, do not let yourself familiarity, even if the other team members communicate with ease. With the guidance should also behave politely and quietly. No need to flatter or to impose their services, otherwise the evil tongues may baptize you sycophant. Gossip and should be avoided.
Do not worry if colleagues initially ignore you or talk not too friendly. Remember that they too need to look to you. Moreover, your appointment may occur after the unpleasant events - such as the controversial dismissal of the person who took this place to you. Be patient and do not worry. You will definitely find its place in the new team, just for this time of need.