first things first...

Hi,

I am moving to Barcelona on Monday. I have read lots of the information on this site (and others) and my head feels like it might explode!
I have somewhere to live so no problem with that. I work via the Internet so should be OK for a month or so before sorting out tax and the like. I have a NHS EHIC from the UK as the first month is more of a holiday/recce. I have an appointment with Spanish school on Tuesday.

From what I can gather the most important things are;

NIE number?
Bank?

Anything else I HAVE to do? I feel I may have missed something vital!

Thanks for any help.

Kavel