Search the board-there are great tips. Here are my few tips:
1) Keep your hair moisturized with a water based moisturizer and seal with a natural oil like coconut or avocado. Make sure you really focus on moisturizing and sealing your ends.
Moisturize at least once a day.
2) Do NOT comb hair when it's dry
3) Only comb (detangle) when wet and filled with a ton of conditioner
4) Deep condition at least once a week with a conditioner made specfically for deep
conditioning.
5) If you can bun it, or find a protective style that requires low manipulation and can protect your ends and keep them moisturized.
6) Good diet and exercise
7) Patience
8) Always have a silk pillow and head scarf-no cotton on your hair-ever.