Almost 10 years ago I covered the Bruce Lee: A Retrospective exhibit in San Francisco--at the time, the only exhibit of Lee's memorabilia and personal papers to date (there was a big exhibition in Seattle in 2003).
Lee was tremendously interested in the whole self-actualization, power of positive thinking, winning friends and influencing people thing. It was quite the rage during the 60s, and from a guy who was a philosophy major after all, such introspection would have been quite normal.
The exhibit had a small 3x5 card, with affirmations written by Lee in ballpoint pen. I wrote them down--these days you'd whip out your iPhone and take a photo of the exhibit in question, but back then you had to do things the old-fashioned journalist way, spiral notepad and all.
Here's what Lee wanted to remind himself:
I guess if Lee were alive today he could've tweeted these to what I'm sure would've been an enormous rank of followers.