Like it or not, there will always be that one thing you don't want or can't do.
The most common limits usually are bodily fluids (scat, pee, blood), extreme pain, and anal. Now hear me out: that's ok to have limits and communication is the key to any successful relationship. Never let someone pressure you into doing something that you already stated as a hard limit. It's also ok to try something you thought you liked and realize you don't want it anymore, that's why we have safe words.
Immediately leave a session or a relationship when your safe word is not respected, this is no longer domination, this is abuse. Domination presupposes the existence of a person's submission to another, either in an erotic or lifestyle set. This is expressed by a range of behaviors or rituals performed to please each other throughout the roles of power in the relationship.
We can do that in as many ways as you can imagine, such as video calls, sexting sessions, phone or even you receiving tasks to complete. The roles of Dominance and submission, resemble the society lifestyle in terms of culture in relationships of power. But in this case, it's way broader when it comes to a variety of emotions, role choosing, and other activities. The Domme being the top dictates the rules for the Sub on how they should behave or do. The Subs' role is to obey and do as they are told.
Creativity here is the key to explore a wild range of scenarios and possibilities. In my sessions, I like to incorporate all kinds of kinks in a domination setting. Roleplays are amazing to perform a domination fantasy. As I've worked as a secretary for many years, the boss/secretary RP is one of my favorites as it's so close to home.
Another very popular in Domination Fetish is the role of the Mommy Domme. The father of psychology, Freud, explains that every little boy's first love is his own mother. "The Oedipus Complex" makes the dominant Mommy become a sexy taboo that many men enjoy in secret. On the other hand, Daddy Dom Little Girl - DDLG - is another dynamic that is very popular with its own terms and sub culture.