Often i have come across instances where people keep driving at break neck speeds without having much knowledge about how their cars would respond to certain situations ..
For eg :
1. Lack of back end grip due to weight transfer under heavy braking ..
2. The importance of downshifting instead of sitting on the breaks ..
3. The way ur car handles around corners and bends at high speeds ..
4. Also there always seems to be a misunderstanding that RACING Lines are DANGEROUS .. What are racing lines ??
Arent they the
safest yet the quickest way to get around a corner ?? How ??
Well if u go from outside to outside u loose speed , time et all and also could end up loosing the grip and oversteer badly (mostly incase of FWDs).. I have tried this on track to see the difference and the effects of running wide could be ghastly .. Specially to those who at times max out their speedos on winding public roads without taking the proper lines (read on roads with dividers in btwn such that ther is no oncoming traffic barring there are no vehicles around as well).. This could lead to eminent dangers of hitting the dividers and sommersolting on running wide ..
Also often i have seen many people doing a 3 digit speed , break hard on seeing a curve all the way until they get out .. Doesnt this lead to oversteer ?? And dangerous ??
5. Use of opposite lock in certain drastic conditions and how it works ..
6. Use of handbreaks in emergencies to avoid head on collisions .. Its better to go sideways into a barrier than head on .. If done right atleast saves u the engine

..
7. Importance of not turning ur steering wheel when the wheels are locked due to heavy braking .. This sudden change in steering inputs could make u loose control of the car completely ..
8. Importance of not spinning ur wheels to get good times either at drag launches or on tracks ..
How important is it for u to know how ur car handles ?? What factor could it play in ensuring u better control over ur car ??
PS : I have learnt quite a lot of these technicalities by going to track days and can see that they play a major role in driving either on city or highways too .. How much do u think it helps ??