A few posts I like about this subject:
http://blog.asmartbear.com/sacrifice-your-health-for-your-st... http://www.techcrunch.com/2008/03/07/calacanis-fires-people-... http://eu.techcrunch.com/2009/11/20/european-startups-need-t...
A few posts I like about this subject:
http://blog.asmartbear.com/sacrifice-your-health-for-your-st... http://www.techcrunch.com/2008/03/07/calacanis-fires-people-... http://eu.techcrunch.com/2009/11/20/european-startups-need-t...
There are several factors
- You make more mistakes - You have trouble applying yourself - You loose the ability to think creatively, so you don't see solutions - You don't make the intuitive leaps that used to save so much time - You stop coming up with as many great ideas
The best way I know to reduce this effect is to make sure you spend your leisure time doing productive business stuff. Network, discuss business plans, email, twitter, blog, research - just don't expect to do any one thing (code for example) 60-80 hours a week for months and not get bitten on the ass by your own exhaustion.