The best tidbit of advise I can give anyone who wants to raise their level of braking skill is, "Load the tire before you work the tire". If you load the front tire by squeezing the lever until the forks have compressed these modern day tires that we are blessed with will perform flawlessly on clean dry pavement.
This really is the best advice and it works for far more than just braking actually. Throttle control, turn in, and everything you do on a bike or even a car makes a difference in entrance and exit speeds, as well as safety! If you can't understand this, you need to learn or you'll end up going down sooner than later.
I was recently (actually a little over a year ago now) in a situation where I had to emergency brake from probably about 80-90mph as I was attempting to pass somebody with a dangerous corner coming up too quickly, getting stretched far beyond my skill and ability which is my own fault.
The story is, I was attempting to pass another motorcycle in the mountains, as soon as he sees me pull out to pass he guns it, I hesitate for a second (stupid move) and then get on the throttle to pass him (worse move). I end up making a clean pass but there is a hard left coming up fast and on the other side of the road is a weak, low, metal barrier and then a huge cliff with a bunch of tall trees. I'm on my headset telling the guy I'm riding with "I'm going down!" and load the front brake hard enough to make the rear skip as I'm trying to scrub speed harder than I ever have before. At the last moment I know I'm sight locked and my grip isn't enough to bring me to a stop.
At this point I could only do one thing, get into the mentality "if I'm going down, I'm going down sideways into a rail and trying to get through this." Without crossing that shiny center line, I look left hard, take my hands off the brakes, tighten my drivetrain with the throttle a little, counter steer and focus on my body positioning while the bike leans deep into my chicken strips.
Before hitting the apex of the corner I notice my bike has the grip to carry me through at this speed and lean. Before I knew it, I breathed out, rolled on the throttle and rolled the bike back straight from the corner, looked back and the other guy was almost scraping his exhaust getting through that corner. I put a little scoot in my step because I didn't want the dude to catch up because I know if he got me to stop there would be blood.
Scared the holy hell out of me. The only thing that saved my ass is a thought process I thank (amateur) car racing for, because I know damn well I didn't have the skills on a motorcycle to get through that.
As soon as I finish refreshing my forks, put a new rear tire on and get a one piece track suit, I'm going to a track school.