One of the best doctors I ever worked with started his day by walking through the office and saying “good morning” to everyone. He’d do the same before he left at the end of the day, just making sure everyone was ok, to call him if they needed anything, etc.
I don’t know what your career will be but if you’re in a position to do so, I hope you’ll adopt this habit.
Here’s something I wish wasn’t true but is: Looks matter. This is true for anyone but 100x more so for a woman. Take care of yourself. Stay in good shape, eat well, wear sunscreen, dress well and be well-groomed. It shouldn’t matter but it does. (But try not to judge other people by their appearance- Often times the very best people (friends, spouses, job applicants, etc.) don’t look like movie stars. Far from it!) Yes, looks matter but I hope you value true beauty more.
Having an opinion is not the same thing as having an informed opinion.
If you don't know enough about a subject to speak intelligently about it, keep quiet and educate yourself.
Practice "shaking off the sleepy." It's hard to wake up when your body is screaming for more sleep. If you practice, you'll get better. Get up, get in the shower and shake off the sleepy. It works!