Rehearse your words and behaviour in advance, this is the first and foremost. Also you may take an anxiety drug (e.g. valerian root tincture). Helped me a lot. My very first interview was a year after graduation, via phone. I did it not bad and was hired as an executive assistant and interpreter. There I was obliged to communicate with various people face to face and through phone - this facilitated into decreasing of my stutter and shyness. For the next position I was interviewed via phone as well, did good and was employed as interpreter/translator. Back then there was a period when I consumed liquor quite a lot due to pressure and lost my job as a result. Finally, the third interview consisted of two stages: written and verbal - both were alright, though I was not preparing for the second stage and there were doubts in my candidacy (I've stuttered several times but explained that I am really excited). I was hired and now employed as interpreter/technical translator/PA announcer :) Now I do breathing exercises, sleep at least 8 hours, quit drinking and plan to start working out to increase my self-esteem more and avoid falling apart by 40 :D I wish you all the best, you'll definitely find a job and succeed in everything!