Shiseido concealer really works for me... I use a dab of this over my foundation & then a bit of YSL Touche Eclat... The lady at the Shiseido counter told me it's something to do with poor circulation, I've had them since I was a baby :(
Tania for a quick fix, try Benefit products. They have 3 products that can erase dark circles. I love the Ooh la lift and the Erase Paste. They also have Eyebright which is a pencil that helps conceal and brighten the shadows in the corners of your eyes while lifting the outer corners of the eye. The Ooh La Lift brightens the under-eye area with light-reflecting pigments & raspberry extract. x