Studying Abroad in Stockholm - Any (Last-Minute) Advice?

I'm an American student (born and raised) about to depart on a Study Abroad at the KTH Royal Institute of Technology in Stockholm, Sweden this semester (Fall 2017), and wanted to ask if anyone had any additional advice on what I should bring and tips on the culture so that I don't come off as disrespectful.

This is my first time in Sweden (but not in Europe), and I will be there from August 20th until the end of December.

I'm also planning on visiting Munich for a weekend to experience Oktoberfest. I haven't planned any other trips (yet).