Wishing won't do it. Start by doing 15 minutes at just below your bouncing point, whatever that is. Use a really low gear, maybe your lowest. You want pedal effort to be very, very low. Gradually increase cadence and time. No breaks. If you do this once a week year-round, faithfully, in a couple years you'll be amazing yourself. It's just neuromuscular coordination, implanting it in your spine. Plus you'll see real improvement out on the road.