Something I would recommend to anyone: pick a time in your life when you have no reason or need to find a job, or another job than the one you already have. Then, find a job which it would be cool to have anyway, apply for it, and then go on a job interview.
You won't need to worry about how to impress the company, because the stakes are not unrealistically high. You can just answer honestly and be yourself. In this case, it was a preliminary 'getting to know you' type of affair, and I had a great time not disguising any of my weaknesses, and conversely, doing my very best to play up my strengths. It was great fun.
And the best part of all is that it would actually be cool to get the job. It's a really interesting one. This is equal to the fact that whether I get the job or not, I'll be going on leave at the same time anyway. I know it sounds a bit kooky, but I highly recommend it.