Your resume is meaningless
A resume alone rarely gets you inside a company. All it does is outline your past- largely irrelevant since it does not demonstrate how well you can do the job the hiring manager needs done. You should add in a section where you let potential employers know what exactly you can do for them by calling this section "Value Offered". For example: "I will reduce your operations costs by streamlining your claims department".

Don't get lost in HR
Headhunters usually try to get round the HR department. Most HR departments create infrastructure that involves processing paper. They package, organize, sort and file you. If your resume hasn't already gotten lost in the shuffle, they would send your resume to a manager who might know what the work is all about. You might have to wait endless days or weeks even while the manager goes back and forth between him and the hiring manager.

The real matchmaking takes place before an interview
A headhunter only sends a candidate in for an interview if he/she feels that they are suitable or qualified for the job. In your search for a job, make the effort to ensure a good fit. Know the parameters of the job before you go in for an interview. Research about the company- its goals, culture, competitors. Talk to current employees about the company to find out as much as possible about the company from an employee's point of view. The company's website, annual report or literature are good ways of obtaining more information about your potential employers.

*If you find the right fit, you'll be able to go for the interview with confidence, having decided this is where you want to work.

Remember, the employer wants to hire you
The company holds interviews to find the best person suited to the job. They'll be ecstatic if they find out that the person is you- because the manager can stop interviewing and get back to work. Change your nervous attitude and convince yourself that the manager wants to hire you

Gaze into the mirror
Your eyes say a lot about who you are. They also control your expression. Practice talking into the mirror by asking yourself and answering questions and see how you come across. Try involving friends and relatives in a mock interview. Focused, alert, energetic? Or are you fidgety, withdrawn and nervous? You'll be more ready to face unexpected questions that the interviewer might ask.

Before the interview
Dress the part- dress according to what the other employees are wearing. It's always better to be overdressed than underdressed. Keep to complementary, conservative cuts and colours.

Confirm the appointment- Call the interviewer or his/her secretary to confirm the appointment the day before its scheduled if possible. Ask for specific directions if you do not know where the building is located and make an advance trip there to become familiar with the area and traffic. This is will also help you reduce anxiety on the day itself.

Punctuality- it never hurts to arrive earlier than scheduled as this allows you the time to freshen up and regain any composure lost en route. Allow ample time for things beyond your control such as traffic, getting lost or having to find your way through a large office complex.

Caveats- avoid annoying mannerisms. Fidgeting, shuffling, scratching, picking, avoiding eye contact, talking too loudly or softly- these and other nervous habits will be a distraction and detraction from your interview. And don't be critical!

Pretend your interview is your first day at work
Don't treat your interview as an interrogation- the employers asks questions, the candidate gives answers. Avoid this scenario. Your attitude should that be of an employee who's there to talk about a new project, rather than the more obsequious attitude of a candidate who's hoping to get an offer. Tell the interviewer what you hope to do for the company if they hire you. Treat it like a friendly dialogue.

Got an offer? Interview the company
When an employer makes an offer, he does more than deliver a title and a compensation package- he also cedes part of his control over the hiring process. At the beginning of the interview, the potential employer controls the offer and the power that comes with it. But upon making an offer, he transfers this power to the candidate- this is a power few people realize they have. This is where you can change the offer to suit your goals and fully interview the company.

Ask to see the resources that you will be using. Ask for more money- but only if you deserve it. And don't fret about how the employer might react. As long as you present your requests professionally and not demand them, there isn't any reason for the company to not consider the things that are important to you.

Follow-up
Write or call the company or companies on the same day to thank them for taking the time to discuss the position with you (whether or not you got the job) personally. This will help you stand apart from other candidates and remind the interviewers who you are by extending your interest in the company. If you want, you may also call the interviewer to thank them personally.