Is it all right to use a new non-stick pan straight away, or does it need to be seasoned?

Wash and dry it thoroughly first (remember not to use an abrasive scourer or cleaner), and make sure that the surface is well coated with fat or oil when you cook in it the first time. Never use a non-stick pan on full heat - overheating it will almost certainly damage the coating. ln fact, many more non-stick pans are damaged by being overheated than by being scratched.