Big Sexy Hair Shampoo and Conditioner. I buy this at Ulta when they have buy 2 get 2 free, usually in the summer. It ends up being cheaper than drug store brands and the liter bottles last me all year.
Velcro Rollers. Gracie Beth tweeted the other day that she uses hers while her hair is still wet. This cuts back on heat and styling time. Genius!
Now, if you're in a rush and need to dry your hair, I recommend using The Marilyn Brush from Ulta. The hourglass shape creates more of an "S wave" which lifts hair from the roots and flips out at the ends. It doesn't matter if you use the best volumizing shampoo in the world, the trick is how you style it when you are drying. This 100% boar hair bristle brush with do the trick. Trust me, there's a reason it's been featured in In Style, Shape and Lucky Magazine.
Freeze it hair spray. The grand daddy of 'em all. Original formula only, found at Wal-Mart. I spray this on my hair before I style while it's still wet, in my roots when teasing and also all-over my hair after I'm finished.
Rat tooth comb to tease, tease, tease! (Couldn't they have come up with any other name than "rat tail?" Eww! Also, only tease in one direction, not up and down.)
What's your secret to big hair?