Yep, here's a very efficient use of 10 minutes...
http://vimeo.com/9807775
Some of these exercises are easier than others. You'll probably need to work at "flutter-kick V-sit" for a while before you can do it properly for a full minute. Oof!
I think what you're hinting at is the lack of motivation for actually doing this sort of thing on a regular basis, which I can sympathise with. But if you rattle through the exercises, 3 x 10 mins per week really can make a difference, otherwise another way to deal with the motivational issue is to join a class. Even if you did a handful of pilates classes, to learn how to do the exercises properly (learn how to "engage your core" then went your own way, this would be good time investment. Or just get into the habit of doing something like the 10 mins work-out straight after an easy run a few times a week.