Earning a promotion isn't always easy. If you're expecting one soon, be ready to train your replacement. It shows your manager that promoting you won't leave them scrambling to fill your role.
Lily Zhang, writing for The Muse, explains how this helps your chances of being promoted:
What is your team or company going to do if you're not longer in your current role? If you don't have a plan in place, that can be a serious deterrent for promoting you.
Plan for your succession, or if you're in a more entry-level role, document processes you oversee, training you've completed, and your general responsibilities so that it will be easy to train someone to take your place.
Then, when you do land that promotion, this plan will make things easier for everyone. For more advice on how to increase the likelihood of moving up, check out the full post linked below.