Tips for making online presentation over Skype I am about to complete my PhD. My area is functional analytic/ operator theoretic aspects of quantum information. I am applying for post-doctoral  positions in various places. Recently, one group called me for presentation/ interview over Skype. It should consist of a presentation (20 minutes) and 20 minutes interview. My questions are the following: 


What are the common things one should focus while presenting online, and what I should avoid (say, in my slide, or oral comments etc).
The people who called me for interview are physicists (my work is connected to quantum information). As a mathematics student, what is the best way to make myself presentable in these cases. 


Some background: I have two publications, some old preprints (arxiv, on discrete mathematics, but not published and not connected with my present research) and a few in draft form (not submitted in arxiv yet). Published papers are not mathematically very exiting, but came up in some reasonably good and well reputed physics journals. Also what I am afraid is, they are not reviewed in math review (many papers from the same journal are frequently reviewed though).  

I am a bit afraid, as this is my first time of appearing in such interview (and the reasons mentioned above). Advanced thanks for your helps and suggestions.
The question asks a number of things. I am going to focus on interviewing over Skype/video conferencing since it is extremely difficult to do correctly. The issues associated with interviewing is very different from presenting.

Some things to consider when doing a Skype interview


Location: You need a private setting, a good internet connection, a backup landline, good lighting, and good acoustics. I suggest investing in a off white sheet to use as a backdrop. It is also useful for the camera to be directly in front of you so that it appears you are looking at them when you look at the screen. Make sure you have your notes and a drink within reach.
Timing: You need to know when the interview is happening including the timezone and who is initiating the call. You also need to know what happens if there is a problem. You do not want to lose your valuable interview time to technical problems.
Attendees: Once the interview starts, you need to know who is in the room and where they are sitting. If there are people you cannot see, ask them to move. Ask each person to introduce themselves and make sure you can hear them. During this stage you need to get a baseline read on their facial expressions. You also need to know where they are sitting so that you can "look at them". The slight eye shift required to look at them on the screen is likely not exaggerated enough. Practice this.
Control: Make sure you know who asks each question. Ideally use peoples names so they know you are talking to them. If you don't hear the question, ask them to repeat it. Check that they can hear and see you frequently.
Gestures: You need to minimize your gestures, pointing, and figitng. They are really noticeable on Skype.