I do dry brushing. I have very itchy, almost eczema-like tendencies on my back (I'm always asking DH to scratch my back for me!
) and dry brushing before I shower plus using moisturizer consistently afterward has really done wonders for healing and making my skin less itchy. And I just use a long-handled bath brush with natural bristles, keep it dry at all times, and then my lotion is nothing special, sometimes with scent and sometimes unscented, whatever's on sale. I think right now I'm using some Aveeno something or other.
Cellulite, however... eh. I feel like it's improved a bit since I've been dry brushing and moisturizing, but that's also within the time frame that I've been dieting and exercising, so I'm more likely to attribute it to my overall weight loss than running a brush over my skin.