I have a couple of racks of clothing and models always seem to enjoy rummaging through them and often end up with stuff that they really want to be photographed in. However, I buy very little everyday wear (which a lot of models turn up with), so the collection is largely "party" stuff.
I have of modest supply of shoes and boots, but largely rely on the model to bring what fits them. Ditto for underwear.
I also have a large collection of costume jewellery - it is always well recevied.