Many studies (here's one that is interesting: http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1281386) have been made on the Mozart Effect, some with more credibility than others. It seems that there could be an increase in brain power after listening to classical music. Although, I'm not the sharpest knife in the drawer and I've been listening or actively engaged in creating classical music for well over 25 years. But don't let me through the curve!
Nonetheless, if music motivates you to study more, or stimulates you towards a stronger vilance, then that's fantastic! Whether it can make you smarter or not, well I'll leave that to the PhD's out there to argue. I can't help but see some effectiveness. One thing for sure, it doesn't hurt to listen to more music, and Mozart is a pretty cool composer.