I also have long hair past my waist and as I have no talent in fixing hair, I usually just leave it alone and keep it in a braid, but I do use a couple of products to keep it healthy, one is "L`ANZA be long ProtecShine," it has stopped the split ends, and the tube lasts a long time, I use a small amt after each shampoo condition just about the size of a quarter in my hand then rub it in,Their conditioner is good also but expensive, I then use a Pick to comb out instead of brush or comb. I also found that "Fructis conditioner for long & strong" is working well
at least for a while, I usually change conditioner brands at least twice a year as they seem to quit doing what I want them to do which is keep it soft and shiny