A media kit can be a great tool for promoting your work and can be used to try to get mentions in publications or to try to get speaking engagements or  spots on radio or TV. 

A few do's and don'ts:

• Do include your complete contact information as well as your website/blog address
• Do include a personal biography and a photograph of yourself
• Do include a business card
• Do include any recent articles or endorsements
• Do include a good cover sheet that summarizes the contents of your media kit
• Do include a copy of your latest book
• Don't over do it--these days everyone is busy and have short attention spans. Keep it relevant and to the point.
• Don't include clippings of every press mention that you've ever gotten--go with either the most recent or the most impressive. Everything else can be summarized on your cover sheet (remember to be concise).