Avoid overusing styling products. Using too many lotions, creams, conditioners and the like can be just as destructive to the hair as using none. Hair-care products can build up over time, smothering your hair in a coating of oil and chemicals and irritating your scalp. Stick to a few reliable products and rotate them occasionally to keep them from building up.
If you want to prevent split ends from forming, it's important that you have your hair trimmed regularly. If you keep your hair short, you should have it cut every 6 to 8 weeks. If you have long hair or would like to grow your hair out, it's still essential that you trim it on a regular basis.
It is a widespread myth that using a coloring product on the hair will always leave the hair damaged and weakened. Most coloring products these days are formulated with a lot of added conditioners so it is pretty safe to use them. Go to a salon if you are not sure of how to do it.