Add/Drop week—some may take it for granted, but my advice to you is DON'T. I thought I had my classes wired when I chose them—I was the king of the world, ready for anything college threw at me. And then, bam! Reality. What I thought were five classes that would be absolutely perfect for me and easy enough for me to handle, were actually a slew of very serious classes that were waaaay over my head.
Luckily, I realized this on my first day of classes, so what did I do? I went straight to my adviser and talked things over with her. She knew right where I was coming from and understood my situation perfectly, and we worked together to make a perfect schedule for me. After the full week of experimenting and talking around with different professors, I knew I had a perfect schedule.
Schools know that the situation that happened to me happens to many others, and that is why Add/Drop week is in existence. Your school will want you to have a good learning experience just as much as you want to, so they make this great luxury available to you.
My piece of advice is to take advantage of Add/Drop week, but do not overdo it. Do not drop a class simply because you do not like the content and/or the teacher. I dropped my classes because I could tell on the first day that it was not the right fit for me. Get a feel for your classes—what you like and don’t like. And then make an educated decision with your adviser on what to do about them. There are hundreds of different courses offered at every university, and it will not be too hard to find a curriculum that fits your needs perfectly.