People in the adult entertainment industry require quality photos of themselves for their agents to show prospective clients, or for their own web sites. Many people in this area of entertainment may have tattoos, and the emphasis of these images is to show what the entertainer looks like without emphasis on the tattoos. Discuss with your agents as to requirements - some want erotic, others just want to show your face and body. Some may want the photos to be what's called "FaceBook Friendly" in that nipples and genitalia are not displayed.
E-Cards and business cards are also an option once the photo is taken and selected - you just need to provide the text.
Your ability to get work will depend greatly on your portfolio, so it is important you look your best for the shoot. Get plenty of rest the night before and don't come to the shoot with red and bleary eyed. Ensure your outfits are clean and presentable. Consider having your hair and makeup professionally done.