When you are blowdrying, blow dry with a medium barrel brush.
Tighten the hair around (like a roller) the brush and blow dry each section.
When you let the hair go, twist the section of hair around and pin it on top of your head with a curling pin.
Continue with another section of hair...
Eventually your hair will be pinned up.....
When finished, take the pins out and your hair will be full of loose waves and lots of body.
Spray if wanted.
Quicker than a curling iron and hot roller, I have those too and I use this technique cuz it's what my hairstylist does to my hair when I want the "pornstar hair" (those are her words LOL)
I posted this in a different thread, but it's the technique I use to get big loose waves and lots of body. The blowout will last days.....