Tips please.

I've settled on Suit B, the hot-looking George @ Asda number. I'm teaming it with a light blue shirt with button-down collar, and I think a slightly darker-blue tie.

I've trimmed the beard, and have worked out some stock answers. Does anyone have anything they think I should definitely do, or definitely avoid doing?

And if anyone's around for a drink tonight, I'll be out of Blackfriars at around 7, so may need one to calm down. Thnx.