How to grow my hair longer?

Hi there! So my hair right now is right above my stomach (about). I would like to grow it out to around the waist area. I have layers, but not huge ones. They are just cut around the collar bone and those are my only layers. I have extremely thin hair so I have to wash my hair every day or every two days. I plan to use Neutrogena Triple Moisture shampoo. I do not use heat appliances, but instead brush my hair out. I often leave my hair in a bun because I read that one of the main reasons for hair stopping growth is because of breakage and the number one reason for that is because of the contact with fabrics. I recently got a hair cut about 2 weeks ago. I know that it really helps to use deep conditioner every week or 2 weeks. and to also use hair masks. I use hot water when I shower, not so good so I'll work on that. I have lots of vitamins and eat lots of fruits and veggies. What else can I do to make my hair grow to around the waist area?