Okay, what kind of racing are you planning on doing? Post-base training can vary based on the type of racing you want to do. I'd recommend doing some reading over the winter so you can plan your training year. The usual reference is The Cyclist's Training Bible by Joe Friel. My copy is on the bookshelf in front of me. Most racers have a copy - they may not use it, but they have it. Another useful book is Base Building for Cyclists by Thomas Chapple. One or both will get you started in the right direction.