Split ends are a problem that involves loss of water from the hair fibre, together with a loss of the outer cell covering (cuticle), which is then subjected to abrasive and drying effects. You have to examine how you shampoo and dry your hair. As a guide, you should shampoo at least twice a week or daily if you live in a large city. Use warm water and two applications of shampoo (one if shampooing daily), rinse thoroughly and use a conditioner to the ends of the hair. Pat the hair dry; do not rub the hair vigorously with a towel.
Try to minimise the use of heated rollers, hair dryers and other heat generating processes.