You may want to follow up with the people who have interviewed you. A timely and polite call may help to make up minds. Contact the employer if you haven't heard whether you have got the job or not within a week or so of interviewing to ask if you can provide any additional information. If appropriately done, all these can help you show your keenness in the job.
Make sure you send thank you letters to your interviewers as that may also help to leave a favourable impression..
