You do not need straight A’s to get a good job out of college and you also do not need to do every sport or activity offered. Overloading yourself will make you not enjoy those clubs, sports, and your major. Pick the activities you cannot live without and keep in mind what will help you in the future, but if you need a semester or two of focusing on just one activity, that will definitely not penalize you. In fact, it can help you in learning how to manage your time and figure out what is really important to you.
