You push the clutch in, move the stick to neutral, let the clutch out and then push it back in, then put the stick into the next gear. If you need to match gear speeds for a downshift you give it a little blip of throttle in neutral to make it easier to get into the lower gear.
Agreed, and I've been in trucking for 46 years so I've deadsticked and double clutched my fair share for sure. However, I'm switching over so I can get into first gear at a much higher speed. I want to canyon drive my cars at whatever speed is prudent without horsing it into first.
