Learn Morse Code. JAR does not require you to do it ....but do it.
The tape costs a tenner from one of the magazines. Knowing morse is invaluable it saved me several times in training when I had misdialled or not flip-flopped a frequency.
The other thing is to brush up on your IFR comms...you will have little spare capacity for RT so make it automated.
Where are you going for your IR?
All the best.