What can you do to build your confidence?

I got to say, the past week has been horrible for me because I have a crucial job interview coming up for a company I really want to work for.

Why should I be worried? My friends are confident I'll nail the job. My family is just the same. For me though, I know this interview will drill me on my knowledge as a programmer. Honestly I would say programming is a weakness of mine, whereas my strong points are interface design, optimization, and being addicted to the field.

How can one build their confidence about situations such as this? I've found over the past few years is to look at what relevant events you've been through that tie to your career field. As a web developer/designer I have seen a lot. I've come a LONG way since my days of programming horrid looking web sites on Angelfire. I've come a long way since last year's 1st place finish at the PBL NLC with Chris Pund (cheap plug, I know). My love for Web 2.0, aka the Semantic Web, was just taking off. From then to now, I must say that my PHP and MySQL understanding has increased tremendously and I have really gotten back into javascripting. I never really realized how important it's features can be to stabilizing the user experience.

Where am I going with this? I've come a long way and I'm still improving everyday. I have the upperhand against most students my age, in my location at least just because of my passion and desire to improve. I love this industry and it doesn't get any better than picking up something new.

You know, after thinking back on all of this - I should be worried afterall. I should just go, show them what I have to offer, and see how it goes from there.

It's something else I can learn from :).