Just curious to hear what everyone here has to say! I see some really experienced members on these boards and think we all could benefit. This was my first semester teaching and it definitely opened up my eyes.
My pieces of advice (maybe they are already obvious, but I learned a lot of these from this semester):
-I would say that no matter how much time you spend outlining and writing a rubric for a paper or project, be prepared for students to ignore it (and to inevitably be upset when they get their grades)
-Never assume that upper-level students know how to write properly
-Include a section on the syllabus about how to email professors/TAs/other administrators at school appropriately
-And most importantly I think next semester I will make a syllabus/policy quiz mandatory so everyone knows exactly what is expected of them and so they are all aware of exactly what plagiarism is (I was a TA for an upper-level course but apparently it is still not a known fact what plagiarism entails even as a junior)