Although it is humorous now, an addiction to caffinee can become a serious health issue, caffinee is not good for you or your brain, and to much of it over a long perod of time can cause serious liver damage and brain problems
http://www.teeccino.com/Top10Reasons.aspx
Look em for yourself =)
http://www.teeccino.com/motivation.aspx
if you have troubles sleeping, the cause is most likely to much caffinee