I'm going the other way, so I don't know how much this applies, but: I've found that the emotional transition is taking a lot longer than I expected -- over a year so far and I'm still in the "kitten caught in a dryer" stage. And from what I hear, I can expect that I will occasionally look in the mirror and see my old self pretty much for the rest of my life.
It's not just what we see in the mirror, either. We're kind of like immigrants, and like immigrants, no matter how long we've lived in our new country/gender, where we came from will be a part of us forever. At some point we have to make peace with that.
The advice to find other things to think about is good. I mean, sooner or later the transition will as far as it can go and you'll just be living your like like any cis man. What will you do with yourself when you no longer have transition to get obsessed with?