MORE IDEAS FROM THE ARTICLE
An assertive person takes full responsibility for herself and her actions.
Be quick to forgive. Every conflict needs a clear resolution that acknowledges hurt feelings and finds a solution that begins to mend them.
When it comes to toxic people, fixating on how crazy and difficult they are gives them power over you.
Focus instead on how you're going to go about handling them. This makes you more effective by putting you in control.
Usually, arguments initially center around a specific topic/disagreement/response that made a person upset. If allowed to continue, the argument can become heated, accelerating quickly to personal attacks.
Make a concerted effort to imagine it unfolding before it actually does — and then nip it in the bud.