I take it that you partially changed "my mistakes" to include nicotine. I enjoyed your article on it - but how are you using it?
Are you rotating with other stimulants on a regular basis, using when you like, using to promote habit formation etc.
See http://www.gwern.net/Nootropics#nicotine
I haven't been doing anything systematically with it because I'm still getting a handle on dosage and effects - it is, unfortunately, not as powerful as modafinil or Adderall, so it can be hard for me to get a lock on how long it lasts, how to administer, etc to the point where I could try rotation or double-blinds.
Latest in an irregular series, some of whose previous entries were Edge.org and the Girl Scouts...
I examine the Folding@home distributed computing project with reference to the costs (electricity resulting in air pollution causing deaths) and benefits (some papers): http://www.gwern.net/Charity is not about helping. Additional data on either side of the cost-benefit is welcome.
(I also recently split out my essay describing things I have changed my mind on.)