Dump it all on the floor, make her try on things and give her my honest opinion of how she looks in it, then shift things into a Donate pile, Toss pile and be done with it.
But knowing a language's strengths and weaknesses — based on information beyond hype and public opinion — can give you a better handle on when to use it and when to pass.
It immediately uncovers the source of the information and should give insight into whether the bulk of it is based on scientific fact or educated opinion.