Thou Shalt Get Regular Haircuts
Good news: according to Townsend, you don't have to get a chop every six weeks. Rather, a haircut every three or four months is sufficient. "At least dust off a quarter of an inch because once the hair splits, you can never fix it," he warned. "You can only prevent it."
PS: your hair only grows a quarter of an inch to one inch a month. So if you have long hair, be aware that some of the bottom ends are really old and might need a trim.