Definitely seeing how somebody that knows the track drives is one thing you want to do - see where they brake, what side of the track and how far they are, where they coast, how they accelerate - softly/linearly (?) or just punch it out!
Obviously with the slow-in fast-out approach, you shouldn't go grandma-slow, but enough to have good speed and be able to hit the apex right instead of hitting it or coasting mid-track.
One thing I know I have to do is replace my rear uni's - worn-in pins mess with my braking/accelerating in corners, and go slower into a corner - i go too wide sometimes.