I love the book of Philippians in the New Testament. The entire book is one of Paul's greatest letters. Specifically, chapter 2 is a gem. Paul lays out some strong language regarding teamwork and working together.
Verse 2-5: "Make my joy complete by being of the same mind, maintaining the same love, united in spirit, intent on one purpose. Do nothing from selfishness or empty conceit, but with humility of mind regard one another as more important than yourselves. Do not merely look out for your own personal interests, but also for the interests of others. Have this attitude in yourselves which was also in Christ Jesus." (New American Standard)
1. Be like-minded.
2. Be loving
3. Be united
4. Be focused (on one purpose)
5. Be selfless
6. Be humble
7. Look out for others before yourself
8. Be Christ-like
Teamwork 101.