I time myself as well, but not with a stop watch. I usually note the time I hop out of my truck. I always do an interior first. After I complete the interior, I run to my truck to grab a quick drink and check the time. (sometimes, LOL)
Then when I am finished all together and get back in the truck, I check the time.
I have been shaving a bit of time off my details lately as well. More-so since the beginning of 2007, when I made a vow to quit doing extras without getting paid.
I did a 2006? Black, Dodge Ram 3500 Dually, (4dr) in a tad more than 4 hours the other day. And an 03 stang today in just under 2.5 hours.
One thing that has been saving my tail...... PwS....... Period.
Edit.... I get in my "zone" as well. Once I get in that, everything else is blacked out. Seriously. When the customer comes up to me, it scares the ish out of me.....