Offer to pay in cash ( but if you do make sure and get the transaction on video and don't have the cash with you, go to an ATM after the shoot is finished)
Offer to send a driver/cab to pick them up
Make them feel comfortable about showing up by sending a photo of the people who they will be working with. I have a photo of myself and my hair/makeup girl that I send to most models.
Communication the day before and the morning of the shoot is good but it does not always help. I have talked to girls who have said "I am just down the steet, be there in 5 minutes" and they have flaked.
