[dentist90]

On an upshift, not only is a throttle blip unnecessary it is counter productive. You want the input shaft to spin down to match the rotation of the output shaft in the next higher gear. Double clutching is only purposeful on a downshift, and it takes some practice to get it down right, especially when you're braking into a corner. Much easier to practice it when you're slowing down in a straight line , say as you approach an upcoming stop sign.