Every time I would get my hair cut whoever did the cutting would go on and on about how wonderful my hair is, and how they never see hair like mine. Then they would ask me my secret.
Here is the secret: I wash it twice a week (three times in the summer and sometimes only once in the winter if the weather has been really dry), and rarely blow dry it. By “rarely” I mean maybe two or three times a year when I need it dry in a hurry. I never use any curling irons or other hot devices on my hair.