quantification

A useful insight: On the 4 days/week that I work, if I'm to get 8 hours of sleep, I only have about 90 minutes free time -- if all goes well. One hour in the morning, 30 minutes at lunch. I'm not counting 30 minutes for each meal and 30 minutes at the end of the day for cleaning up my dinner mess and getting ready for bed - that's not free time. I'm currently using my morning hour to go online and my 30 minutes at lunch for taking a walk. When David takes care of E in the evening, I can add another 90 minutes or so.

This doesn't seem like very much time, to me, 90 minutes a day. What do you all have? Should I feel better about this?