Vitamins, water, trim the dead ends, maybe get extensions? stop straightening your hair or curlying it alot because thats when it starts to get all burnt and dry. oh and if you dye it, maybe thats why it causes hair to not grow anymore.
have watched many people try many things to do this, and I have done a small amount of experimenting. I have found that pulling with a small amount of pressure will increase the length of facial hair. I have and have worn my hair on my head, with a "rat-tail" for many years. Braiding and pulling with a slight pressure increases the length allot more than just letting it grow unbraided. I am told by my black friends that braiding their hair in tight braids increases the length allot. Hope this helps..