I had a former high school player, who is now a college student/athlete, contact me about the topic of clubhouse culture and how to create a winning atmosphere inside the locker room. The following is the response that I gave him, and exactly what we are trying to implement in spring training:
Clubhouse culture is really just an extension of the way people treat each other. That is true in the clubhouse or in your own house. Selflessly serving people around you creates a culture of "others-centered" living. The natural clubhouse atmosphere is overrun with self-centered agendas and that will ruin a home or a team.
Encourage the guys to stay far from gossip and backstabbing and force themselves to intentionally search for ways to challenge and encourage others...even the ones that are fighting to take their position. It is amazing how this will create a clubhouse that people enjoy going to, and will stay around to do the extra work.
When it comes down to it, the Golden Rule is really hard to beat. Treat people the way that you want to be treated. Most people, however, never really know what it feels like to be treated like they really want to be treated, so they don't have a good example of how to treat others. The best advice that I can give is to selflessly serve the people around you, with no thought of getting anything in return. Eventually, the contagious nature of your generosity will make its way back to you and a bond of trust will infiltrate your clubhouse.
This will not be an overnight transition. It starts with one person (you) making the effort to do things differently. The right thing is seldom the easy thing, but treat people right and a bond is formed that is hard to break. That is the foundation of a winning team.