I learned that trying to explain this topic to others is like forbidden fruit. Unless asked for. But I am going to write some anyways, because this why we are at this forum anyways.
There is no thing like ego, its not somebody. That's the problem itself. Its just your mind, which is forgotten that its just your tool given to you to put it to good use. And than there is something else behind it, that comes first. That perceives the output of the mind. Emotions, memories, all kinds of perceptions, everything.
After reading a lot of stuff, not particularly mindfulness but about anything, it really changed how i view the world. And i feel like it really comes down to the level of awareness you have about your inner working as a human.
One great example I experienced and got me speechless, more than once or twice: Little children, who barely able to talk, just about 3 or 4 years old, got a question about about who did something bad in the past? And they are going to say their name. And the "adults" in the room are going to laugh, because it sounds funny to them. But the child did not intended it to be a joke, that`s obvious. Its that they does not yet identified themselves with their memories. And the adults laughed because its so obvious for them to say: "I did it". But its really just a memory at that point.