Keep your posture comfortable, relaxed and stable, it stops you moving your head around and changing your reference point for the aircraft attitude.
Look "down the road" into the middle distance with a quick scan in if you need to check your hover height. (Try driving your car staring at the closest part of the road over the bonnet and you'll see how hard it is) This enables you to get a reference point for the helicopters attitude and see an attitude change. The key to hovering is to correct any attitude change before the aircraft then moves over the ground from that change.
Keep your legs relaxed and don't push one foot against the other. You should be able to remove your right foot from the pedal without the left pedal moving. (A good way to relax your legs is to regularly remove your right foot a couple of cm from the pedal and then return it.) Downstream practice left and right spot turns using only your left foot with the right one removed (in the R22 H300 etc)
Keep your right forearm supported on your leg and only move your wrist and fingers. Only extreme control inputs (slope landings for example) will require you to move your arm. (A signwriter supports their arm for precise painting).
Keep a loose grip and don't wrap a fist around it. Make smooth inputs and wait momentarily for the effect. Use finger pressures only (if you are compressing the foam of the R22 controls you are way too tense).
The only interface you have with the machine is through the controls. The way you hold and manipulate the controls determines if that interface will be good or bad, and ultimately your precision as a pilot downstream.
It takes a while to learn to ride a bike, same thing for hovering, so just do the time.