Intriguing thought.
What would I say to myself, two years ago.

I used to play too tight and too loose. I used to try and play like the guys on the WPT and WSOP, I'd hear that they were a loose cannon, or so tight and strong and I'd try to play to the same image.
Don't, it's not profitable. Don't play tight, and don't play loose, just make the best choices on a hand by hand basis and leave it at that.

That, or I could tell myself to stop thinking so much about what other people are thinking. Most poker players will mislead themselves, you don't have to do much work to fool them, in fact, the less emphasis you put on misleading them, the further deluded they become.

That's two things. If I can only say one, let it be this:
Don't over complicate things, play smart, be responsible and all will go well.