The drama of daily life

Today is another one of those days where I feel like a bad actress - I'm sitting at my desk wondering (sometimes aloud) "What's my motivation?"

I have finished my project. I'm ahead of schedule. They don't want me to go on until they deliver this portion. They won't deliver this portion until my useless coworker finishes up his project and IT'S been delivered. My useless coworker is not only useless, he's clueless. So what's my new task?

Help the useless guy.
The guy who supposedly has more experience than I do.
The guy who supposedly knows more than I do.
The guy who won' t shut up about how he makes more than I do.

I suspect that it's the last one that annoys me the most.
Ah well. Back to the grindstone.
What was my motivation again?