The most important thing is to use examples.
Interviewer "So you say you can handle telephone conflicts well"
You "Yes, that's right. In my position at blah working in the claims area (or whatever), I often had customers ring who weren't happy, so I had to ensure I dealt with the situation by doing blah, blah and blah."
Interviewer "In this position you will use Microsoft Excel regularly"
You: "Oh that's great, in my last position I was involved in doing blah which I had to use Excel for. I had to sort data, run reports, extract information blah blah blah" or "I haven't had a lot of Excel in an office environment, but I know the basics, and I certainly know my way around a computer, so with a bit of guidance, I am sure I will learn the more detailed aspects very fast"
And so forth... The most important thing is to try and relax, admit it if you're so nervous you think it's impeding your interview, and talk about your experience. If you haven't had a lot of on the job experience, talk about personal experience. "When I was volunteering at the animal shelter, I often dealt with difficult people, and would handle the situation by doing blah". I threw the word "animal" into the interview I had for this job, and it turned out the boss who was interviewing me said that she loves animals, also volunteers at her local shelter, and how they've drastically reduced the euthanasia rates in her area directly from the work her and a couple of others had done. I knew then I was in
If you can relate to the interviewers, they're more likely to warm up to you
What sort of job are you going for? I can think up some likely questions if you'd like.