Buy the book "Feel the Fear and Do It Anyway", by Susan Jeffers. Just do baby steps........

Start out with just saying "Hi" to people and being comfortable with it and maintain eye contact when you do. ( If this seems to difficult, just smile while maintaining eye contact then move on to saying "Hi").... Do that for 3 to 5 days. Make it a goal to say "Hi" to people you honestly don't know... no matter the response. For the next 3 days learn to compliment people out loud, then tell them to have a great day. "I love those earrings. Have a great day.".  Then graduate to saying: "Hi, can I offer you my card" hand it to them and say, "Thanks, Have a nice day." Make a goal to give away at least 5 cards a day for 3 days. Think of it as offering a piece of gum. Do you get scared and offended when someone says, "No thank you, I don't care for any gum." ?
After that is accomplished, say: "Hi, I couldn't help but notice you, you are so sharp looking or I was just admiring your____(shoes, makeup, etc.) would it offend you if I offer you my card?" Great! My name is ----, and I am a professional Mary Kay beauty consultant in this area. I would love to get your opinion of our products or give you a complimentary facial/makeover with our quality products. Here, please fill out the other end of my card (give her a NICE pen) and check the boxes that may interest you. (please let her fill it out) Okay, one side is for me and the other is for you. --(say her name)--, are you a morning person or a night owl? Great! It was a pleasure meeting you and I will call you in a few days to set up your pampering appointment. Have a great day!
 
**Make the words your own and practice in the mirror, to your dog, stuffed animals. Warm chatter your hubby or sister consultants. Practice tames the tongue***

Hope this helps. I know you can do it!!!!

Good Luck,
Carol Jones