When Skyping our family I've realised that how I sit seems to be a key issue related to how I look on the screen. Using the tablet (when snuggled up on the sofa), I think that I look crumpled, old, and more than my 66 years. (Not helped by us almost always Skyping in the UK evening because they live overseas and are eight hours behind UK time. Thus I'm into "evening" mode, on the sofa.) I think I appear notably better if I Skype whilst sitting upright on an "office" chair, with the desktop camera slightly higher than my face, so that I look up to it slightly. Also I recommend scarves, jewellery, and keeping your chin up a bit!