Help Me Pretty Please! How do I grow my hair out healthy and strong?

I have decided to stop coloring my hair for a little while, so that will help me be able to grow my hair out healthy. But, what else can I do? I usually flat iron my hair (Chi) and use Paul Mitchell's Super Skinny Serum. The ends of my hair are pretty dry, so I know while I am growing my hair out, I have got to get it trimmed every so often. Thanks for whatever advice you all may have for me ^_^