How to rotate an object?

Questions & Answers
1

Quaternion is unnecessarily complicated. To move object you just use transform.position and a vector, easy. To rotate, this one is very confusing.

2

I believe you can use Quaternion.Euler() that takes in a Vector3 and will convert to the Quaternion you need. Here's a link to go into full detail: http://unity3d.com/support/documentation/ScriptReference/Quaternion.Euler.html

3 
      function Update() {
     // Slowly rotate the object around its X axis at 1 degree/second.
      transform.Rotate(Vector3.right * Time.deltaTime);
     // ... at the same time as spinning relative to the global
     // Y axis at the same speed.
     transform.Rotate(Vector3.up * Time.deltaTime, Space.World);
     }