I have noticed that constantly tying my hair back has weakened the hair around my face so I'm conscious of using a headband that doesn't pull on the hair. I'm also putting my faith in the products Liv Tyler swears by (have you seen her hair? You will too!):L'Oreal Volume Expand. Speaks for itself!
Products I have tried and rated: LOVE!
Lady Jayne Vibrant Monochrome Headband (flexible so it doesn't pull!), Snag free elastics, Vibrant Monochrome Bobby Pins, Bun Style and ponytail cuffs
Terax Shine Leave-In Conditioner (NO stickiness, just glossiness!)
Lady Jayne available at Priceline. Terax available here.
L'Oreal Serie Volum Expand available via Hairhouse Warehouse, Petra and salons.