Quick Bits: MonoBehaviour Message Reference is a handy C# script that includes simple examples for all built-in MonoBehaviour Messages such as Start, Update, OnColliderEnter, etc.
Each function includes the official Unity Documentation, handy tips for using these functions, and simple Debug.Log() statements to assist in debugging or learning.
No longer do you need to consult the documentation to be sure you have the right method signature for a given function. This is a great reference and simple debug tool, and is easier to copy and paste from than the official documentation.