any tips to make hair grow longer?

So in the past, I used a shampoo that I learned (the hard way, unfortunately) is terrible for your hair to use every day for about four years. It caused my hair to get extremely thin and damaged. My hair would not grow past the base of my neck during that time period. Now, I've been taking care of my hair. Since March, I've changed my diet to include heathier foods and more water. I've certainly changed shampoos to one that has vitamins to help hair grow longer and I have the matching conditioner. Recently, I bought some oil to help my hair be stronger. My hair is now a little longer, thicker, and definitely healthier. Is there anything else that I could do to help with getting healthy, long hair?