If you haven’t yet checked out Stephen Wolfram’s blog post from March 8th, you absolutely need to. I was impressed with how many categories of data he kept, not just his presentation and analysis of it. He analyzed his email, walking, phone time, keystrokes, and calendar events. And he did this for all of the last decade! Wow. Here are his averages from over that time, shown against the hours in the day.
This was also a nice chance for him to advertise the incredible power of all of his software!
As for email, you can do an analysis on your gmail account from the past year by using this free utility from toutapp.com. I did it and really enjoyed seeing who my top contacts were, learning that I reply to 18% of the emails I receive, and that 47% of the emails I send get responses. Each month on average I received 240 emails and sent 69 emails. And in 2011, I had to deal with a total of 3299 emails. All of this is just in my personal email account, too! I have two other email accounts as well. Go get your analysis!