When it comes to self defense, many folks have not considered how to use de-escalation. Talking to people is generally the most legally defensible use of force that is available to the general public.
Talk it out:
This article is written for medical personnel that have to deal with patients for prolonged periods of time, but I can be a good basis for getting yourself out of trouble (at least with someone that can be reasoned with). This is especially useful if you bump into an intoxicated person, or get in a vehicle accident. Many other situations could call for de-escalation, but make sure it is appropriate for the situation.
Remember that if the situation continues to escalate, the next step is setting boundaries. Ask, tell, demand that a person respect our space and boundaries. And then, as prepared defenders that carry defensive tools, make them stop the attack.
Here is a link to the article: