I also use engine braking immediately BEFORE the turn, if possible, and try to get an idea of what gear my bike will 'like' given the radius and length of the turn or curve. I did almost go down once when I down shifted from 4th to 2nd too late IN the middle of a curve and locked up the rear for a moment on some gravel.

When I am approaching the turn or curve (even stopped at a traffic light) I always think to myself " OUTSIDE - INSIDE - OUTSIDE ." Meaning exactly what Dwight was refering to ie... Start and continue my turn from the 'outside' (of my lane) to the apex, BUT always looking with my head towards the "inside."
After reaching the apex, I slowly accelerate across towards the "inside" and then exiting the turn I increase my acceleration and steer slowly back to the "outside." This late apex turn will let me see what hazards I am turning into earlier. It will also keep me from forcing myself too wide and running out of road trying to do an imposible turn because I improperly started out on the inside.

I went down once when a car pulled out in front of me as I was in the middle of a slow turn. A panic stop before you can staighten the bike up and it just will drop. I've never been real sure of what else a person can do when this happens.