A single brain can't bounce different ideas off of each other. Each team member has a responsibility to contribute equally and offer their unique perspective on a problem to arrive at the best possible solution. Teamwork can lead to better decisions, products, or services. The quality of teamwork may be measured by analyzing the following six components of collaboration among team members: communication, coordination, balance of member contributions, mutual support, effort, and cohesion.

Leadership : Execution and Teamwork

Though this is merely an advertisement,
but watching it makes you understand the Importance of TEAM WORK

This video will inspire positive thinking and drive away any kind of bad mood.

Positive Attitude is Everything - Very Funny Attitude Video - Inspirational