I used to have curly (frizzy !!) hair to my waist. I tried braiding it, using a cloth mask strap and conditioner also. The thing I found that worked the best was twisting my hair up into a beanie cap. I know its not the most attractive thing, but it saved all the frustrations of dealing with long hair.
Now that I have donated it all to Locks for Love, I have my cute little natural curls and am a happy diver!