How should I follow up application?
So after 2 weeks of not hearing back should I follow up with an email, phone call, or not at all in the following:

1. After just an application
2. After an interview
3. After a follow-up email with no response

Also if you have any suggestions of what to say in the email or call that would be awesome.

Thanks everyone!
[{"id": "eqkmn2f", "text": "Did you send a thank you email?", "replies": [{"id": "eqkmxv5", "text": "I do after interviews but this would be after not hearing back for a couple of weeks. My issue right now (although I've run into all of the above before) is I don't know if I should follow up an application with a phone call or email.", "replies": [{"id": "eqknt96", "text": "I\u2019d call and say \u201cI just want to check in and ask if there were any topics we may not have covered in the interview that would better qualify me for the job.\u201d", "replies": [], "depth": 3}], "depth": 2}, {"id": "eqkn13l", "text": "Or hand written card. I\u2019d call after a few weeks if not hearing back", "replies": [], "depth": 2}], "depth": 1}, {"id": "eqlebki", "text": "If you're in a sales role, not analyst or other role, keep calling and following up in other ways until they give you the job or tell you to fuck off.", "replies": [{"id": "eqofe9n", "text": "Seriously. If you are in sales, it is your job to follow up, it may even be part of the interview process lol. \n\nIf it is an analyst roll, well, maybe you dodged a bullet with that one. Speaking as an analyst of course.", "replies": [], "depth": 2}, {"id": "eqqntpl", "text": "This is exactly what I was wondering, I\u2019m built for sales and have been holding myself back from calling but I\u2019m going to go in heavy pursuit tomorrow haha", "replies": [], "depth": 2}], "depth": 1}, {"id": "eqob0io", "text": "All of the above. I will email and call until I get a response. Doing about  a follow up every 2-3 days alternating between emailing and calling. People like persistence and it is important to show you are eager. Just don\u2019t bother them every day lol.", "replies": [], "depth": 1}, {"id": "eqphnoa", "text": "What do you have to lose by contacting them", "replies": [], "depth": 1}]