I know. It can feel really awkward to role play these conversations with a friend or mentor. It can feel even more awkward to practice negotiation with yourself. But, it's so much better to feel the discomfort during practice so that you are able to walk into a salary negotiation with greater confidence and certainty of your approach.
You can take time on your own to practice reiterating your skills, accomplishments, and the outcomes you've delivered and expect to achieve in this new role. With a partner, practice engaging in dialogue where you are decidedly saying the salary you want to make out loud.
How much does your voice shake when you say that number? Do you look down? Get kind of sheepish or sullen when you start talking about your value? Yea...stop that.
A very wise woman I know often uses the phrase "practice makes progress." I think this is very apt for how to approach a salary or promotion negotiation. You get one chance to put your best foot forward in these situations. Don't let pride or fear keep you from preparing fully for this process.
What strategies have you used to prepare for a salary negotiation?