My 2c of advice would not be about watching your airspeed but to spend time practicing stalling, just as much for the ability to know when you are operating close to the stall (and so will not unintentionally allow the aircraft to get there) as about recovery techniques.
If you spin at circuit height it is too late - recovery technique skills probably won't get you out in time.
If you however are familiar and comfortable with stalling, you know if you are close to applying stall (or stall/spin) entry inputs and at circuit height, you won't!
Being comfortable stalling also gives confidence that you know the aircraft and can confidently operate it under all normal regions of the flight envelope.
Sadly stalling can often taught in a way that doesn't build confidence - particularly so if the instructor was badly taught in their ab-initio training - the pattern keeps repeating.
