lets see,
1) Too much water
2) Folar feeding (spraying leaves) with fertilizer water
3) Plants too close to hot lamp
4) Over stretched and fell over (light too far away)
5) Bugs (spidermites mostly), killed 2 plants which led me to no. 6
6) Not following instructions on pesticide (sprayed 2 days in a row and killed
10 of my best plants in a matter of hours)

Yes, I know, pretty crappy however I am currently growing what is looking to be my best crop yet (althoug still very early, end of the first week) and have improved my strategy IMMENSELY due in a majority to rollitup.org. So to all you horticultural vets out there, thanks for the help.