It is important to have members with excellent technical skills in most agile projects to succeed deliver desired customer value. But even more important is that the members have great collaborative and communication skills. Without the ability to collaborate efficiently the team will have a tough time to succeed with the project. The soft part of product development includes both how the members act against each other, but also how good they all are in introspectiveness and adaptability. They need this to be able to mature as a team compared to just being a bunch of individuals acting under a common project hat.
There are many ways you can improve your ability to inspect your own behavior and adapt and change it accordingly. Working together with others and asking them to give you feedback is one great way of improving yourselves. Last year I found, a bit surprisingly, another way of improving my skills in collaboration and team work; I took on a personal sport challenge with the goal to perform a race one year ahead. This challenge has learned me a lot about myself and has also improved my collaboration skills.