Robz and spumoni are right on... I especially liked Robz's leggo analogy! The hard thing about orgo was that you had to learn how to learn in a whole new way. If you try to go through and memorize how every single little molecule behaves in every single reaction you will most likely freak yourself out and not do very well. I suggest buying a model kit and making all the different conformations, and building the molecules to give yourself a hands-on, 3D way of looking how it works. Also, instead of memorizing "X, Y, and Z are good leaving groups", learn what makes a good leaving group and what factors effect that group's ability to leave.
Also, do a little bit every day. You cannot cram for orgo. Just designate 1-2 hours a day as orgo time, and really focus during that time. Do all the problems your teacher assigned you, and then do them again. And do them again. Don't just memorzie how to do it, learn why it works that way. Organic chemistry is all about sizes, shapes, and pattern recognition. Once you learn the properties and rules of the game, you can figure out what happens when given a new situation.