Remember to thank the employer for providing a valuable learning opportunity and memorable experience. You can thank them personally on your last day on the job,send them a thank you note, or email no more than a week after you have finished work. Do ask if they would be a reference for you. A year will go by fast and to have that reference will be valuable. Be sure when you use them as a reference to call before you interview that they are still willing to be a reference for you. Employers may move on or change roles so it is good practice to make sure they are up to date and have current information for your future employers.