When resigning from a job make sure to type up your letter and keep it professional. You don’t want to burn any bridges when you leave as you may need this company as a reference. You should always give two weeks notice as a professional courtesy. It is really important to be sure that you want to leave the job you have today. I have had employees call me a couple of months later wanting their job back. Depending on the employee and if we were hiring I sometimes could take them back. Some companies have a time period before you are eligble to come back so watch that as well.