Re: hourly rate

Mark spells it out pretty well. Rather then simply echoing his advice, I'll add just one more thing...

I don't recommend setting a pure simple "hourly rate". I'd set a day rate (up to ten hours) a half day rate (for those times you work between 1 minute and 4 hours on a project during a day) and an "overtime" hourly rate (the overtime rate should be well above your daily rate divided by 10, I'd say at least double).

This keeps you from losing full days of work because you booked a project that only took 90 minutes. I book a minimum half day for any project. There are a number of reasons for doing so, including:

*It keeps clients from "underestimating" the time it takes to edit something.

*It help keep you from working with "grinders" who only want to pay for a couple of hours of work, even though booking the edit session with them blows away the time you could have booked for a larger job.

*In my opinion, that 11th or 12th hour you spend doing "one more thing before we wrap up and you go home" is worth more than any of the hours during your "expected normal" working hours. It gives everyone a reason to wrap the project up in a timely manner rather than keep going that same day. (There's not as much incentive if you are "already here anyway and it will only add a couple of hours to the finished cost".)
JMHO