Soon to relocate and live in spain

Hi

We are soon to relocate and live in spain and would appreciate any help or where to find good sound information on the do's and do nots to be legal living in spain.

we already have property and NIE
We expect basic issues in the uk probably very different and we would welcome advice from those that have successfully relocated and any pitfalls to avoid.
driving
phones
internet
anything

Thanks in advance Tony