My routine is simple:
I wash my hair at night and let it air dry completely. This is what it looks like when it air dries:
I wake up and brush my hair out and apply dry shampoo on my roots for volume. After brushing through the dry shampoo, I section off my hair starting from the top and put in about 4-5 rollers.
I use these Big Curl rollers:
I go about my normal morning routine and wear the rollers in the car to my destination. I get a lot of strange looks and stares in the Starbucks drive-thru line, but I'll gladly take the glares for good hair.
As soon as I take out the rollers, my hair is normally really poofy for about 30 minutes:
After a while, it tames down and just looks normal:
That's my secret!