Lessons learned from the Book "The Tao of Chip Kelly:

Lesson 1 "Win the Day" 

The only thing we can control is today.  It means practice harder be Freddy Kruger like in attentiveness and focus on execution.  (Freddy Kruger= Relentlessness)

Lesson 2 "Feed the Tuna Mayonnaise" 

Become efficient No one stops to correct or explain things to one player while everyone else stands around watching.  If a player needs it explained he is substituted out of the play until he gets it while every else continues.  The goal is to get as many reps in practice as possible one rep every 20 seconds in Group, Seven on Seven, Inside, Half-Line, and Team.
http://www.footballscoop.com/news/9676-take-a-look-at-chip-kelly-s-music-playlist-for-practice

Lesson 3 Receivers are expected to block 

Receivers are expected to block on run plays and screens just as well as they catch passes.  It is a very selfish player who refuses to block for his teammates.  (See 2.32 of YouTube video bellow)