Make sure you excel in all of your classes and take any opportunity to do your own research or to gain experience in a clinical setting. You will need more than an undergraduate bachelor of arts/sciences to work in the field. You'll also need to get a masters and PhD. I'm starting a PhD program in a couple months. It was extremely difficult to get in. I applied to 12 places and got accepted to two (I had awesome grades and good experience too). Just remember to keep your eye on the prize. You'll have years of hard work ahead of you but if you stay dedicated you can do it. Good luck! : )