For ages, my recovery rides have been recovery in name only. They've been true "junk miles": not hard enough to make me faster, but too hard to let me recover from my last ride. About all I can say for them is that they helped build volume, and maybe that helped... somehow.
I'm determined to make my easy days truly easy, so today I actually maintained discipline and kept my cadence up, my heart rate down, and my pace steady, and completed an hour-long recovery ride.
I did this today without a cadence sensor, but I've now put my cadence sensor on my road bike and set up a screen on my GPS with just two numbers: heart rate and cadence. That should make it super-easy to stay on track for future recovery rides.