Inevitably, there will be more than one class you'd like to take scheduled for the same time slot. Some conferences require advance registration for each class, so in that case, you have a tough decision to make. But other conferences, like the Colorado Gold, allow you to pick your classes as you go (big plus!). Create a list of back-ups, just in case one class isn't working for you. You can make a discrete exit and slip into another. On the other hand, if you have an open time slot, check out a class that you're not sure about. It might turn out to be great!