got a scanner today
Probably the best approach (that's what I did!).
You learn the local customs that way, which may not exactly match what it says in the book.
Eg, the book tells you to say where you are, but with some radar units the conversation in real life goes like this:
"xxx, G-ABCD request MATZ penetration (or Traffic Service, or whatever)"
"G-CD squawk 1234"
"1234 G-CD"
"G-CD you are identified, pass your message"
at which point they obviously know where you are so no point in spending air time telling them again.