schedueling for classes

Its that time to start thinking about what classes to take for the fall semester. Im pretty excited that I have all of my general courses done and out of they way. Now all I have to do is finish with the classes in my major. The only problem with this is that a large number of them are offered at the same time. This makes it tough to get in enough credits to get done with school in four years. I am able to scheduele enough the next two sememsters without any conflict, but I know the closer I get to graduation the harder it will be. I wish some of the classes were offered more often than they are or have two or three classes a sememster instead of just one.