Thanks for that - I'll definitely give that book a look. * Went from being able to work on a computer unbearably 35 hours a week to 70+ virtually pain free (wh

Thanks for that - I'll definitely give that book a look. * Went from being able to work on a computer unbearably 35 hours a week to 70+ virtually pain free (when I worked for a YC startup) That's definitely encouraging. At the moment I can manage about 40 hours a week. Any more than that (like I'm doing at the moment) and the pain comes back :(