The way i found to get better is like most things just practice practice practice.

I use to arrange a day off get the keys to the track and go and practice and take a mate or my brother along to watch and be a marshal as well.

I also took along a Stopwatch and got my mate to time my laps while i had 5 mins set on my watch. would see what times and the amount of laps i got done.

Its all you can do like the V8s have a test day just do the same thing if possible at your usual track and work on Brake Markers Turn in points etc. You concentrate more when you are the only car out there too and not under pressure.

my 2 cents