-> I basically use this technique, but it very much depends on certain variable situations. Take note; I'm 6'3 and my shoe size are 13 (US). and I perform a different styled heel-toe and LFB:
Arcade (ie.
Initial D Arcade series) -> I've always use this technique. But I basically treat it as my 'handbrake/E-brake' to initiate sudden transitions I need to execute certain corners. In other words, I somehow 'tap' or 'blip' my left foot to upset the cars balance and tend to oversteer (just like any e-brake).
PC Sims (ie.
iRacing) -> Since I've always 'feel' that most cars that I've dealt with on many PC sims are 'twitchy' (because I never owned a PC sim, I tend to use any of my friends systems). I use LFB very carefully before attacking every apex when needed. Based on my experiences with any
Logitech wheels, all of its pedals (no matter what model) seems to be narrow and I can't use my regular shoes (unlike in real life). Every time I tend to use any VG pedals I have to be either sock-covered or bare-footed. The only real-life car on which have the same very narrow pedal placement is my boss' '04 Lotus Exige [Ser.2] (US) <Supercharged>.
GT series (4/HD/5P) [steering wheel] -> Almost the same application as in PC sims, but the way the PD implemented it was 'smoother' and 'linear'. Unlike PC sims, most of the cars in GT are more 'relaxed' and more tuned to real life
driving. My duration of implementing LFB is substantially longer than I usually use in PC sims. Meaning, my duration time using LFB is very similar as I do in real life and it works very well. But again, the VG pedals are too narrow.
Real Life (FWD, AWD, and select A/T cars) -> I do apply LFB religiously before I got my S2000 (when I used to have FF {Integra} & AWD {WRX} cars). In real life, LFB takes a while to master. But the benefits are so rewarding that you will love yourself as well as the car that you are driving. I apply LFB with sheer caution and finesse, if you 'feel' that the car is not gripping enough then use a gentle touch of LFB. Same goes if you driving through the gravel w/ AWD; to prepare the next corner, I tend to apply LFB to 'rotate' the car at a desired position and rally my way (sideways) through the corner (it was a super fun and addicting experience).
GT series (1/2/3/4/5P/PSP/5TT) [controller (D-Pad)] -> This application is quite tricky and difficult to master (besides GT4). The lack of pressure sensitivity accurracy of the DS1, PSP, & DS3 make modulating LFB thru your right index finger can somehow be fustrating! Yes, the DS3 on the PS3 is also pressure sensitive, but the sensitivity and accuracy are way off. The delay thru the wireless conectivity is the main culprit here, whereas you are unable to 'modulate' your throttle/brake buttons, hence resulting to and on/off situation. It is no different with GTPSP. Only the GT4 with the DS2 can implement the perfect replication of LFB.
^ I hope this helps.