I track all my time on my PC with 15m granularity. I have done this for 3 years since I started freelance work. I have my own highly hierachical structure of cost centers from which I generate TeX invoices. I could give you a lot of common task times. But these obviously are mostly about surfing, reading, office work, invoice...

Examples:

• write invoices: 1h/month

• time tracking: 15m/day (including all time tracking for principals)

• web surfing: 9h/month (not including research-like browsing which is 5h/month and not including lesswrong which has had a significant impact recently that I added a new cost center for it)

• family budget: 2h/month

• paperwork: 1h/week

I also track private projects. One example is a trading card game with scientific facts which I created for my children - this took 110h in all including research, images.test games, talks to teachers.

My wife is a living timetable and drives a very elaborate time management regime (which is helpful if you have four children). She seems to exactly know how long 'common tasks' take. We plan the following times:

• laundry: (6m plus 10m/person)/day

• cooking: 1h/day

• fruit basket: 2m/person/day

• daily house cleanup: 20m/day

• prepare breakfast: 15m

• meal preparation and cleanup (2x/day): 30m/day

• bath a child: 15m

• bed ritual: 15m/child

and then there are lots of planned times for educational topics, events, courses, ...

Note that that these times are the result of discipline and routine and you shouldn't assume that you can reach or beat them easily.