OP - I'm a relatively new PPL and talking of circuits, I'm off to do some shortly myself. You will always need to keep practising circuits even once you have your license. It is where there is the most going on, the highest workload, the most aircraft in the vicinity, oh and the ground is close as well.
I always feel much better and sharper after I've done an hour in the circuit, so when I passed my GST I told myself I will do circuits at least every couple of months to keep on top of my skills and practise something that you only do once in a navigational a to b flight, i.e. landing.
It will come, believe me, I had some terrible circuit sessions when I started as there is so much to do, but the trick is to try and stay ahead of the aeroplane. Always be thinking what am I going to be doing next so that you are not in a rush.
On top of it all, enjoy learning. Its a great journey and only the start..
Happy flying.