My advice is this: Only take on a workload THAT YOU CAN ACTUALLY HANDLE. Don't lie to yourself.

If you think you are going to be doing too much with your course load this summer, so much so that it could be painful and cause you to burn out, and therefore not do well in the courses or with yourself and your needs (like you said about relaxation, fun and exercise), then maybe you should reconsider taking so much on your plate.

Will you also be taking classes in the fall? If so, then I might consider finding a way to take it a little easier this summer so you can be rejuvenated for the longer term ahead. How much time do you have between the end of your summer classes and the start of the fall semester?

I always think I can take on more than I'm actually comfortable with. Before you do anything, I encourage you to really step back and think, "Is this something I can do in a healthy way?" If so, all the power to you! But if perhaps not, then think--"What's the worst that could happen by taking a course off my plate?" Or, "How could I do this in a more healthy way?"

Good luck!

-CHANGEwillcome