Do you charge to stare at progress bars?

Obviously multitasking is preferable, but let us assume you are hired hourly for a particular job. This seems to happen fairly frequently. Either you are waiting for gigs of data to copy or databases to rebuild or …

Just seems like after many years I can never get used to it. I really try to leave to go do another job, but everyone knows as soon as I get far enough away progress will be interrupted by countless variables.

How do you deal with waiting?