How can I give myself a good introduction before presenting?

The introductions purpose is to help establish the speaker's credibility.
It should create interest in the speaker and what the speaker has to say.

A good introduction to the delivery of your presentation is extremely important. The first minute or so sets the stage for the rest of your talk and the audiences perception of you.

It is very important to start strong.

Some questions that should be addressed:

• Why this topic?
• Why this topic for this audience?
• Why this topic for this audience at this time?
• your experience with the topic.

Answer enough to let people know why they should listen to you.

• Who are you?
• What is your topic?
• Why is it important?
• Don't give away the secret of your talk, but whet their appetite.
• What will they have gained by the time the talk is finished? Don't feel shy to promise that they'll learn something useful; they really want to know that.

Here are some other ideas for openers:
1. Ask your audience a question and ask them to raise hands in reply.
"How many of you have previously used our technology?..."
2. Begin with an interesting, relevant fact or quote. Then use that quote to launch your talk.
"IDC determined that the world generated 161 billion gigabytes – 161 exabytes – of digital information last year...That's like 12 stacks of books that each reach from the Earth to the sun. Or you might think of it as three million times the information in all the books ever written, according to IDC."
3. Mention something another speaker said, or a current event, that is related to your presentation.
4. Start with a short, relevant personal story or experience.