If you fancy practising your r/t in a live simulated environment, try one of the online ATC/Flight Sim systems. I'd suggest VATSIM because that's what I'm involved in.
see
www.vatsim.net and
www.vatsim-uk.org
Here in the UK we do our best to simulate the real world procedures as closely as possible, and a number of our virtual controllers are real world pilots (or even in a few cases real world controllers). You can either use the controller software to observer and listen, or get your flightsimulator out, and practice flying. I'll PM you with further details.
Thames_virtual