If they promise to call you, ask about the date and approximate time of the call. If you have to go through another round, learn all its subtleties in order to be prepared. Don’t be afraid to ask for more information, as it will help you avoid omissions and feel more confident.
Don’t forget to thank your potential employer after the interview, and remember: even if you’ve been rejected, it’s no cause for despair. Ask the company to explain the reason for the rejection – you’re entitled by law to receive a comprehensive answer. This will help you find out and overcome your drawbacks as a prospective employee.