Heel Toe?

[manipula]

This lot above covered it basically.

For what it's worth if I get in a car with someone for a spirited drive and they can't heel and toe and blip gear changes you can let me out. Absolutely fundamental to quick driving IMO. Same goes for two hands on the wheel at all times, braking and changing gear before a corner not in it (though trail braking to get the ass of the car out is slightly different as it's intentional).

The idea behind blipping downchanges, and heel and toe is to relieve or minimise the effect of the bodyweight of the car changing whilst you're 'on one.' If you're proper hurling down a road braking hard into a corner and then change gear by dipping the clutch and selecting gear, then letting the clutch up so the revs of the engine do that horrible struggled whine as they try and catch up with the speed the gearbox is running at, you're gonna unsettle the car. It will lurch forward and when you're on one that can be and often is enough to get the car to lose stability and grip.

Blip your downchange or use heel and toe and there's no sudden lurching forward of the weight of the car.

Double de-clutching is a technique largely redundant in modern cars with syncro mesh boxes, but should be learned anyway IMO to enable you to drive anything smoothly, not just modern cars. I'm currently practising it and have it down until I am on one, at which point I'm not quite quick enough or reliable enough yet to use it safely.

Also think about left foot braking...