Today at a modeling casting a girl asked me if I had a nail file. It reminded me of all the things we don't think we need but really do to prepare for a casting. Even if it is for a hand modeling job!
1. Nail file
3. clear nailpolish
other items to keep handy are FRESH compcards without an agency sticker on it, what if you only have a few cards left and they all have the name of the other agency you work with and you have a casting from a different one. Wait to place stickers until you get a casting.
Also tweezers and a comb go a long way in a rush!