Different things work for different people, but I have been flying with alot of asian students, and they become fairly decent.
What they all do is to backseat eachothers flights.
When they are in the backseat watching they collegue fly and talk, they can, in a relaxed state, hear what is being said in this and that situation.
They also get the practical procedures memorized VERY quickly this way.
Highly recommended
Second thing they actually are REQURIED to do at our school is to TAPE the ATC/Cockpit convos and listen to them after every flight to analyze both communications and the practical procedures (very helpful during instrument training)
Most people have some issues with the radio in the beginning.
I had the same feeling in the beginning, but as mentioned earlier, ATC are NORMAL ppl, and actually there to help you.
Thats what I always tell my students "Dont care if you make slipups, RELAX and remember that ATC are required to help you"
Now radio communitcation is second nature to me..but havent always been.
If they are speaking way too fast...just ask them "Say again, slower"
This MIGHT annoy them a little, but its both YOU and THEIR best intrest that everything is understood.