Domination over assertiveness techniques

In today's we have been said to do an activity that, as almost all ones related to assertiveness, has make me think a lot because as I have already said in other posts , if you can control your way of being assertive you also have a lot of ways of getting benefits in professional world when you work in team. Today we have seen differnt techniques that can help us in order to achieve this domination over our feelings. From all of these techniques I would like to highlight the fogging technique which consists in reflecting what the other person has said and then saying “but”and say your statement. This is a very clever way of being assertive because you communicate that you're listen to the orther person and you also seem sympathetic, but furthermore you bring the conversation where you want in order to make the other person do what you want him to do.
I hope I am able to use some of these techniques in the future!