Goodwill means you wish someone good, even if you don’t know them well. Working on your goodwill will make people feel they are important to you and that you care about them. Overall, it will improve your charisma.
Some of the following exercises work instantly, some of them do not. Experiment with them to see what works for you.
Imagine that the person you are speaking to has angel wings.
This might change your perspective and allow you to see the person as someone fundamentally good. It will soften and warm your reaction to that person.
Try different phrases like:
“I like you. And I like you just for you.”
“Just love as much as you can from wherever you are.”
“Of all the options open to me right now, which one would bring the most love into this world?”