Remember when Sex and the City 's Carrie Bradshaw faced the brutal realization that she couldn't buy her apartment because she'd already spent her money on a closet full of Manolos? Well, if Carrie had met Catey first, she'd own her co-op and be on her way to a comfortable retirement!? Catey Hill is the online money expert for the Daily News Web site--and author of this humorous, practical "girlfriends guide" to personal finance for 20- and 30-something...