How can I get my natural hair more defined?

I have been natural for about two and a half years and I have decided to do wash and go s more often. I used to where my hair in buns, twist outs, etc until now. I have been trying to get my hair really defined all though out instead of just at the ends. I can t seem to get my roots defined unless I use a ton of product on it, which I hate because it weighs my hair down. So I was wondering what products or techniques I could use to help my roots get defined.