Want to encourage people to think you are one of the 'Rich and Famous'? Try out this wiki.

[edit] Steps

Get out of the house and be seen! Go to all the popular parties.
Surround yourself with only pretty people. Well, maybe one ugly person so you don't look too conceited, but all your friends MUST be fashionable.
Buy some oversize sunglasses.
Buy some designer labels, if you can't afford them, buy knock-offs
If you are going to a party or a club or anywhere really, hire a car, not a limo. The only people that still rent limos are going to funerals and proms. Any late model luxury sedan will do.
Get a close group of friends that you really like and invite them to come with you, you don't want to be a loner! Have your friends follow you about, like the Harajuku girls and Gwen Stefani.
Dress like a celebrity but add your own twist! You don't want to look exactly like someone else! Find your own niche.
Get glittery! You probably can't afford diamond jewelry, so buy fake diamonds; they look just as good and it isn't as bad when you lose them while dancing.
Do something A-list to your hair! Curl your hair or put it in a half pony... don't straighten it, this just makes your hair look dry.
Get good arm candy. That means a designer (eBay) handbag and maybe a cute guy. But you don't have to have a guy to make you look good.
Cause some drama! Don't be afraid to say something to someone as long as its the truth! Don't be too goody-goody or you'll end up on the d-list quick. Causing drama is great to make yourself more known.
Get a free mini make-up make-over. They usually give these at popular chain make-up and clothes shops/malls.
Two words. Red Lipstick. If you want instant glamour, put it on and shine! It makes your teeth look whiter!!
Consult your friends for everything... don't leave them out!
Don't be afraid to stand out... Paris Hilton once said life is too short to blend in, and she's right, get noticed. Do some karaoke or start a dance!
Practice your pout in the mirror. Think Angelina Jolie!
Try having a cute catchphrase. Don't say, "That's hot!", because it's not hot, it's so 2004. Try, "That's golden!" and "Ah-mazing!". Try saying something cute like that.
Black-tint your car windows, but check the local regulations.
Make a "demands" list for your parents like Jennifer Lopez e.g.- must have pillows fluffed; it'll probably get you no where with them but it's a lot of fun!
Practice your autograph all the time.
Smile all the time! Be happy and make everyone think your life is perfect, even though nothing can technically be "perfect."

[edit] Tips

Don't act too full of yourself, celebrities are just normal people like us who happen to be famous.
Brush off even the hot guys when they flirt without being mean. But not the hottest...that's the guy you want!
When you make a mistake, relax and don't get embarrassed..instead play it off like you meant to do it or...laugh with the crowd and blame it on your drink.
Read the tabloids and learn about what your favorite celebs do all day.
Enjoy yourself! You are a celebrity, life is fun.
if ya wanna get notice audition! nobody can stop you!

[edit] Warnings

Well, if you want to be a celebrity, act like one. I mean act like one; don't just dress up like one, look the part and act the part. If you decide to do anything, be decent at it, or find something you are really good at.
Don't be too conceited. Nobody is perfect and everyone knows that. You'll look fake and nobody will want to be your friend.
Don't come off as too much of a player or someone overly promiscuous.
Don't copy someone else's style or personality--you will get nowhere. You need to have your own "thing." Pick something.
Keep in mind that acting and looking famous won't actually make you famous, unless you have talent or money that people think is worth paying attention to.