If you’re doing a video or Skype interview, position the camera so that the lower edge is in the upper part of your chest—or roughly in line with the third button of a dress shirt—and the top is about a hand’s width above your head. Practice focusing on the webcam rather than the monitor to make eye contact and appear more engaged. Test the microphone, perfect the lighting, tidy up your room, and avoid the bedroom. (When your bed is in the background, it feels a little too personal and a whole lot unprofessional.) Dress up as you would for an in-person interview. A complete ensemble will help you get into character, and if you do need to stand up for some reason, those sweatpants won’t seem like such a good idea.

“During a phone interview, removing the physical component can make it more difficult to make a memorable impression,” says Skillings. Without eye contact, facial expressions, and the like, it can be challenging to read the interviewer, and for them to read you. “It’s more important for your voice and your vocal quality to be enthusiastic and engaging because if you are too monotone in a phone interview, it can come across as a lack of interest and energy.” Experts suggest standing up during a phone interview, as many find that when they are able to exert body language freely, it translates into a more dynamic tone and pitch. Others swear by looking into a mirror and nodding along like you would if you were face to face with your employer. And just like an in-person interview, it never hurts to flash a smile—you’ll sound as enthusiastic as you look. source: http://www.vogue.com/article/job-interview-tips-dos-donts-advice