The following are some core standards for formatting University-level essays and similar types of work in my classes. Not all apply to all types of work (for example, blogs, unessays, or in-class writing assignments). Feel free to ask if you think your work requires something different.
Most of these requirements will be shared by other instructors, especially in English; if you are not told otherwise by an instructor, you probably won’t get in trouble following these guidelines. Whenever I am aware that there are differences of opinion among instructors (or that different types of assignments might require very different formatting, I have indicated this).