Man, these threads can be brutal. I remember posting a few honest questions when I started FI, and they called me a flamer along with a few other things. What can I say, I learned some things from it.
I don't see a minimum experience level for posting, and I could see myself asking a similar question a few yeas ago. So I'll respond seriously.
I'll agree airlinepilotcentral has some good tips. Especially that you should know the airline you're applying for. With multicrew and passengers, its very important to have a personality that people can get along with, with single pilot cargo, that might not be so important.
One airline interview I screwed up by not knowing enough about them. I thought they had a domicile/hub where I was living, turns out they just had a lot of overnighters parked there and a lot of flights throughout the day, but no hub. They seemed kind of turned off at my assumption. Bottom line, knowing who you're applying for shows preparedness, and preparedness is a key issue.
By asking questions on FI, you're showing that you are looking for this kind of information, and I really wish people would stop bashing on people for showing their inexperience.