When I left-foot brake, I brake too early, too much, and too often. I personally don't see too much use in it except in a big-turbo car where you are trying to keep engine load up to avoid falling off boost.
When I left-foot brake, I brake too early, too much, and too often. I personally don't see too much use in it except in a big-turbo car where you are trying to keep engine load up to avoid falling off boost.
In slow, out fast. Lots of understeer issues are caused simply by going into a turn too fast. I'm not disagreeing with all the other advice you've been given, just making an additional suggestion that won't cost anything.
Left foot braking... I use it in my SE-R, and any other FWD car I autocross. But my Miata is so well balanced that I only use it for faster gas-brake-gas transitions than one foot can do alone. I don't need to use it to help transfer weight because the car doesn't require it. BMWs are also set up with near perfect weight distribution, so while I'm sure you could use the technique effectively, a nice dab of torque from your inline-6 should get the rear to rotate just as effectively. 
The tire pressure thing has a lot of variables. Type of tire etc. Also high and low pressures can be extreme. To certain extent a tire has a spring rate, so in general a higher pressure will stiffen the suspension. Nascar, with there Goodyear tires use this theory to help in tuning the chassis. I guess which works will depend on individual circumstance. Try it and see.
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