What Do I Wear?
Solids as a Rock
Avoid patterns and graphic prints as they distract form your face. It's better to go with solid colors that contrast your skin tone but also compliment your eye color. Not only will this appear more professional but you won't have to hide your pictures out of fear that someone will know you actually paid for that Beiber T.
Dress Like An Onion
Say what? Onions wear layers. You can too. Consider things like leather or denim jackets, suit jackets, cardigan sweaters and button down shirts. This not only looks great but gives you options during your shoot to remove items and get some variety out of that look.
If you feel uncomfortable you will look uncomfortable. Now, I think it goes without saying (but I'll say it anyway) comfy doesn't mean that favorite t-shirt you now call vintage just because the color is washed and the print is chipping away.
Failed to Prep? Prepped to Fail!
Take the time to give your clothing some love. Take out that dusty appliance from the closet, put some water in it and get to ironing. Wearing wrinkled clothing says, "I'm lazy and I don't care." Do you think a casting director or talent agency is going to put their faith in someone that can't even muster up enough energy to iron out a few wrinkles?