It is suggested to those that experience anxiety

Never worked for me... I just look through people and they think I'm looking at someone behind them.

That doesn't work. I tried it when I had to give a speech to a bunch of college girls. Not only was I still nervous,but I was nervous and I was pitching a huge tent :( very embarrassing.

This is sadly not true at all. Just look over people's heads when you talk

Not at all
I find the best tool is to pick out one or two faces and imagine you are just talking to them.

I have never done this but I'm pretty sure that would not be effective. Not at all!