[owenmarshall]

Most people try to maintain a good quality network of peers that they can tap later on. All situations are of course different, but I've almost always moved from job to job by reaching out to my network and seeing what kind of positions were open.

That being said, the kind of person that tries to browbeat you into working an extra month with threats isn't a person that will be helpful in the future. Some bosses burn bridges when their employees have the audacity to quit. So don't worry about those kinds of people.