In the opening dream sequence, Dan is wearing a uniform with the traditional UC Berkeley colors (blue and gold) and the script Cal logo. The opposing team wears red, the color of Stanford, Cal's arch rival since the late 19th century.
When Dan Millman is seen lying on top of the old car outside of the gas station, the letters "SM" are spelled out on the top of the car with rocks which are the initials for the actor who plays him (Scott Mechlowicz).
The trivia item below may give away important plot points.
Dan Millman: the author of the book on which the film is based, can be glimpsed for a brief moment as the driver of the car at the gas station when Dan exercises for the first time after his motorcycle crash.