Take your time, take it step by step, and each change will automatically get smoother. Changing gear consists of several actions all taken in turn – lift off the throttle, depress the clutch, change gear, lift clutch, resume pressure on the throttle. When you rush, you’ll end up not making sure you push the gear smoothly into place, or you’ll start moving the gearstick before you’ve fully engaged the clutch.
Be gentle, lightly press the clutch to engage it, don’t stamp on it. Similarly when you release it, do so smoothly, to prevent the car from lurching. You’ll make much smoother gear changes if you lighten up the pressure you apply on the pedals and the force with which you pull the gearstick.
Always take a few moments and plan your gear change in advance. Knowing what your next gear change is going to be, whether it’s up or down, will give your mind a moment to plan exactly where the gear is in the gearbox. Just an extra moment’s thought can help you stop missing gears.