Radio silence after an interview - what are you supposed to do?
The most valuable information you can have to gauge your next step is knowing the employer's timing. Ask the interviewer at the end of the interview about their timeline for hiring and when you can expect to hear back.
I like the ten suggestions in this article, particularly (1) make a plan and give yourself a limit to the number of follow-ups before moving on; (2) make your follow-ups helpful or useful by offering something of value for the employer; (3) use your other connections at the firm or company to find out about where they are in the process and perhaps give a nudge in your direction; (4) don't take it personally, you don't know what happened; and (5) let this experience tell you something about the company.
[SIDE NOTE: The legal field is somewhat notorious for not responding to interviewers that didn't get the job - a practice that I find quite unprofessional in a world where a canned rejection letter is easy to draft and distribute. Candidates appreciate this closure and respect firms that have the courtesy of letting them know they are moving on.]
If you had an interview that you thought went well, I hope these steps are useful in securing the job or at least a response from the employer. For assistance with your job search or HR needs, please contact me for a free consultation.