Q: I'm looking for a new job, and have gotten some interviews, even callbacks. But I still haven't been selected; what am I doing wrong?
A: Either job fit or self-presentation could be factors to consider.
The inner game
Job searching is difficult for most people and takes a lot of energy. The ups and downs and adrenaline surges can be hard to weather, so your first task is to get your emotions under control. Take some deep breaths and let yourself relax.
Think about the interviews you've had. There's probably been quite a variety of experiences — some where you felt really confident and others that didn't seem to go that well. In order to understand the patterns, try describing each interview, the dynamics, the needs of the position and the outcome of the interview.
Now consider the interviews from a "job-fit" perspective. Do you think you actually do have the skills needed? Or, are the jobs different than you thought when you applied or more of a stretch of your existing skills?
It's another matter if you have the right background and still don't advance. In some cases, the company doesn't see the fit — that's a communication issue on your part. In others, they may see the job fit but there may be some other, more subjective, reason you're not being selected. There is a "likability" aspect to interviewing, so if nerves or shyness hold you back, they may not be able to picture working with you.
Finally, think about preparation. Plan your responses and research the company and your interviewers.
The outer game
To get a different result, it's time to refresh your approach to interviews, making the most of the time before each one.