"Taking Care of Business in a Flash"
TCB is a motto that Elvis embraced and you can see it here on his private plane (taken while visiting Graceland a couple of years ago). I'm sure Elvis was quite a driven and focused person to have attained stardom.
I think it's commonly overlooked that famous people have to work hard to achieve their fame; it's not all just luck or timing but a lot of preparation as well. We think their lives are charmed but forget that they probably had to fight their way to the top, struggling to be productive and successful in achieving their goals.
I often think about the acronym TCB when I'm trying to get into a productive mindset. I find it's useful to tell other people you're TCB so you feel mentally more accountable to have something to show for it.
Remember that TCB requires a specific mindset and commitment to Getting Things Done (GTD is another great acronym from productivity guru David Allen).
All the best as you TCB and GTD!