What are you selling?

Some sell ideas.
Some sell skills.
Others sell products.

I belong to the working class.
What do I sell?

Time!
For every minute I spend on clearing the mess. I am paid.
For every meeting I am attending, I'm still paid.

So,
I am happy clearing the mess.
I am happy to attend the meeting.
I am still paid, anway.

Here comes the question:
How can I make the most out of an hour?