Everytime you make a choice, you do, as RT put it, exercise your power.
I find that I am very aware these days of what I do and I stop and think, I am choosing to do this. It makes me stronger, somehow. Sometimes, I think that we think we don't get to choose, but that is not true. When we pretend that there is no choice, well, then we can blame something or someone else and not have to look at our choices too closely.