Although I’ll not be attending Michigan this fall, it was one of my top choices until couple weeks ago. Your advice, aside from the institution specific ones, still apply to all incoming freshmen across the nation.
I visited Michigan twice this year and I loved almost everything about the school, even the part where I thought I would hate huge school, I came to see myself there. I sat as a pre-frosh at IOE professor Shen, and apparently she is really well-liked by many IOE students.
Thanks for your input! 