I'll admit, I'm not very good at making first impressions. It would be nice if I can get some feedback on how to improve this. I also tend to have a very synicle perspective, so I usually jump to the worst possible conclusions. If I could have you're support on this I would be really grateful.

The best way to make a good first impression is to be honest and sincere... and smile and attempt to be friendly. Hopefully the two sets match!

I guess that's the best anyone can really do, I just thought there might be some sort of secret formula to making friends in social website like these where you can't exactly talk face to face. I seem to be completely hopeless at this. But I'll keep that in mind when next time I see someone I like.

One word:
Confidence.

Don't force anything though. When things are forced, you know it and come off awkward.
Shoulders back, head held high, and a smile: it won't even matter if you have toliet paper attached to your shoe.

I have to agree with Scarling Zombie. I just smile and try to be nice and polite to everyone, and I never ever blow anyone off. If they're talking to me, I listen, even if it's about something as dull as what their turkey sandwich tasted like for lunch. If someone else tries to talk to me when I'm busy listening to someone else, I politely ask them to hang on for a sec, and then wait until the person that was talking to me first is finished. Even at work, if I'm talking to or listening to a co-worker and a customer comes to teh counter, I ask the person talking to me to hold on for a moment while I take care of the customer, and then I go back to listening.

In short, I think it's a matter of manners. :)

To be honest, it depends on the situation you're in. If you're trying to meet friends, be yourself, because they'll realize who you really are eventually. It's all right to be a cynic and still be civil. Believe me, I know, I'm quite the cynic myself. On the other hand, if you're trying to make a good first impression for an authority figure, dress nice, be polite, and be the most pleasant version of yourself you can be. (As difficult as that may be sometimes.)

Man, if I knew, I'd tell you.
I have social issues, let's just put it that way. And I try really hard to make a good impression, but I know I just come off as awkward and weird and rude... I don't mean to, I just can't seem to get it right! I'm not even aware that I'm doing something wrong most of the time..

Sorry, this was mostly a vent post for me. :[

It all depends. I'm a stereotypical white girl in the area I live in. (Minus the part that I share my business with everyone I meet). But other than that, I'm pretty normal. I'm funny, cute, and I laugh a lot.
I usually make a good impression depending on the people I meet and how the act towards me. For example, yesterday, my friends Daniel and Carlos brought a BUNCH of people to my house, and I had a blast. When they left, Daniel told me this morning they said good things about me. Some more than others, but regardless no one said anything negative.
I usually don't hold back when I meet new people. (Or at least, I do now xD).
I laugh, be myself. Enjoy my time no matter what's going on. (:

Just try to talk to everyone who looks open, most people are just as scared as you when first meeting people. Personally I keep a check of my body language when first meeting people.

Smile, be friendly, ask about them instead of just talking about yourself, be polite... all the usual stuff.

And use compliments!
They're my secret weapon when I want to make friends with someone.
Some people underestimate the value of compliments, but most people like being complimented, and it's always a good conversation starter.
But make it genuine. Look at them until you find something you genuinely like (even if it's something simple, like their shoes) then compliment it.

Great advice everyone, thanks a lot.

Just be yourself and stay true to who you are... don't change for anyone and just try to go out a bit more so you're used to socializing. You could join a club at school.

Also,
I just love your shoes! xD

Of course, the things other people here have mentioned such as: have confidence, be polite, smile. But those never work for me because I'm the type of person that can't carry on small talk or anything like that. The thing that makes the strongest first impression on me is someone who's weird. If you met my friends, you'd definitely see this. One of my closest friends is probably the most unorthodox person in existence, he's always making up crazy scenarios and acting ridiculous and I love it because I know I'll never run out of things to talk about with him and he makes me laugh. Even if you're polite to someone, they may not see you as someone that they can regularly talk to. I know at least ten people that I see everyday and just say 'hi' to. We never really have conversations and I never go out of my way to find them and hang out because they won't break out of their politeness. You can make a connection to someone better if you're open and acting like your real self so don't be afraid and hide behind a polite smile and a reserved nod.

Put your best shoe forward, kid! :D

That's how you make an impression on others.

Show them what you've got! Know your better points and improve on that.

If you've got not so good points, work on it so you can rectify? -shot-

Improve yourself! Never change yourself into something else. Just improve.

We all have room for improvement and change but nothing too drastic.

People should love you for what you are.

And if they don't?

Don't get mad or disappointed or anything, you can't please everyone.

Hahaha, look at Dale Carnegie's book, (How to Win Friends and Influence people) since it's a business classic. But it can be used in social situations, of course. Smile, and be genuine about it. Be interested in what the other person's interest may be. x]