1. Research them. Look them up and see who they are and what they need.
2. Remember that you are there to contribute to them, not the other way round.
3. Explain your talents that will be of benefit to them. Be direct. (Practice this out loud at home. It's difficult, but necessary.)
4. Compliment their company and them. (This is not BS, but necessary bonding; without it, you will come off as a passive chicken that needs feeding.)
5. Look for clues to find things you have in common and discuss them - things like college, sports, movies.
6. Don't think of an interview as a test with right or wrong answers. It is more a courtship: you must woo them.
7. If you don't have all the experience they're looking for, address it. Tell them that you are a dedicated learner. Give examples and ask for a 3-month trial.
8. Ask for the job enthusiastically. If they say they are "still looking," ask what for and explain how you are a perfect match, and then ask again.
9. Tip: You are neither their student nor their child. You are a trustworthy go-getter, just like them. Act the part.
Make your luck happen!