On average when I was working about 8 horus a day. Now that I don't work, about 12 hours a day. I have courses that are online, there are the forums, CS, web design, correspondence, and some consulting work, all which require the use of a computer.
Sometimes I get up in the morning around 8am. Check email. Check out the HD and ATOT. Start some work. Take a break around 1 for lunch. The get back on the computer at 1:30 till about when I got to sleep. Which may be around 1am. That is probably the max for me but this happens about 2-3 times out of the week.
What can I say, when you have to proof FDA filings, patent filings, advertising materials for companies, and on top of that take courses online, well you're pretty much stuck in from of the comptuer from morning till night. This is not different then when I was back in grade school. I would go home after school and be on there until 1 or 2am. Ahhhh the good old days of BBS and 14.4K modem was the fastest. Using Qmodem Pro or Wildcat BBS.... hahahaha