Be non emotional when the topic is related to compensation.
When working act like money doesn’t matter
But when asking for a raise or negotiating act like it’s the only consideration.
Your manager will try to appeal to your human side and try to remind you owe them something. In reality you are just providing your services for a sum of money. Be very level headed and mentally prepared before hand.
You can just communicate on text message if you feel like your manager will have an upper hand if it’s a live conversation. I find it easy to think before I speak when I use text format.