Remember that your employment is a business relationship between two entities: yourself and your employer. They owe you nothing, neither do you owe them. Don't

Remember that your employment is a business relationship between two entities: yourself and your employer. They owe you nothing, neither do you owe them. Don't try to turn it into a lifestyle, work unpaid overtime, or sacrifice your social life or other important things for the sake of a job. Always give reasonable notice before taking time off or quitting, and try not to burn bridges. Your colleagues will be a valuable resource for your professional future. Don't be "that guy". Politics, religion, your sex life - keep them outside. While at work, focus on your work and avoid divisive or potentially alienating speech (I would also include workplace relationships here - as a general rule, just don't do it, #1 source of drama and unpleasantness).