Dealing With Rejection

We regret to tell you that on this occasion...
If you're job-hunting, the one thing more nerve-racking than going for interviews is getting the call or letter that tells you whether or not you've got the job. If you thought you'd nailed the job, accepting rejection can be particularly tough; the important thing to bear in mind is not to take it personally. If there were five people all perfectly suited to the job, only one person will get it and the company may have picked someone who had something slightly different to offer, perhaps more experience, or more knowledge specific to the job.
Always ask for feedback, reflect on it and most importantly, take on board any criticism in a positive manner, ensuring you avoid making the same mistakes again in the future.
It's crucial that you don't get disheartened and lose confidence. If the interview went well, you know that you are coming across positively, so focus on another possibility - send out another application so that your motivation levels stay high; the last thing you want is to attend another interview and not perform to your best ability.
Research the company beforehand and know your CV like the back of your hand. You should be able to provide several examples of success during your career in various scenarios, which will also give you an added lift.