I held off drinking coffee until I took a job on third shift (midnight - 8AM). Thought I was going to die.
Anyway, now I have at least one cup every morning. I always be sure to have a least one cup of the strong stuff about an hour before I start a Cisco Cert exam. Just to get the juices flowin.
However, someone told me about an article they read (wish I had a link) where a study was done about the effects of caffeine. The conclusion showed that the subject's brain activity showed a slight increase just after drinking a cup. Then after the high wears off the brain activity falls way below where it was before they drank it.
So, I'd say, yes. Start drinking it but, use it strategically (like if you have to study all night or maybe right before you go into a big exam). Don't drink it every day.