If you're planning on quitting here is a list of some things you should know and do both before and during the process. This is intended for field managers but a lot of it applies to anyone who is fed up with UP and is getting ready to move on.
1) Don't give notice.
2) Collect and securely store key numbers/email addresses (payroll, references, etc.). You will probably need to call payroll at least once after you leave. Remember your employee ID# for this reason.
3) Collect all UP property (phone, laptop, etc.) for a fast and orderly return. Give everything you were issued or that they paid for back to them, even if they tell you that you can keep it. Someone will go through a checklist with you. Insist on being given a signed copy. Once they sign, they can't garnish your pay for anything on the list. Make sure that you wipe your personal data from their devices.
4) Set yourself up to leave at the end of the month, or after you're already cut what will be your last check. You should also be paid in full for any unused vacation time within 30 days. If that doesn't happen, keep calling payroll until it does.
5) Arrange references. Be smart about who you ask.
6) You can use vacation days or stress leave that you didn't burn up looking for another job as a bridge to your start date.
7) CC key communications (resignation letter, etc.) to your personal email and keep them as a matter of record. Don't resign by phone or in person. The letter should go to your first-line manager, with the regional HR manager/director CCd. You are not required to provide a reason for quitting.
8) Don't give notice. It isn't required and it does nothing for you.
Good luck.