I'm not sure if this is helpful or not, but I had an interesting insight into this recently... I was doing some vipassana on the three marks of existence, and was thinking about anatta... and later that day, "I" was feeling joyful and peaceful at work (go figure!), and rather than thinking "How nice, I feel great!" I thought, "There is a feeling of peacefulness", as in, the skandhas are coming together at this particular point in time, and *there exists* peacefulness and happiness, rather than *I am the owner* of those particular emotions.
Similarly, today I was a little irritated, and I acknowledged it as "There is anger" as opposed to "I am angry."
Because I did not put the label of an owner on it, it became far less powerful, and dissipated much faster than usual. Which is also a powerful way to penetrate impermanence (anicca) too. (and a great way to handle negative emotions as well!)
I know this is a little more subjective, but, hey, if it helps...
But as its written above, there is no true self, no permanent thing that is *you*, you are not the thinker, you are not your thoughts. These thoughts simply exist as a coming-together of the five aggregates (skandhas).
I've struggled with this concept for so long, but I've been meditating on it a lot, and it seems to be coming together a bit more lately. It's so hard to get rid of self because of the way we're raised, but we've got to keep emptying our jug until we can get rid of all concepts.
Best of luck, keep up the good work!