My hair is so fine and when I am blow waving it, it tangles easily, what can I do?

Eliminate this problem at the conditioning stage. Apply conditioner and, before rinsing out, use a wide-toothed comb taking care not to tug at the hair as this causes it to break easily. When ready to sculpt and style, use a combination of serum and gel which will increase your hair's manageability and give extra definition and shine.