Steps

1. Tone down your fashions. First impressions do count.
   • You can still wear brightly colored clothes, but look at the fit and the style.
   • Wear sophisticated things, but express your style with piece that is a little more funny or wild, for example, big sunglasses, kitten heels, or a crazy tie.
   • Wear more tailored clothing, more put together.
2. Use manners Try to be courteous without being stuffy or inflexible.
   • When meeting new people,shake their hands. A solid grip, but not too hard, two pumps of the hand and let go. Don't look at your hands; look them in the eye. Repeat their name and make an effort to remember it.
   • Avoid interrupting people during conversation; people find this irritating.
   • Don't play with things, look away, or fidget.
3. Think before you speak. If you can't think of anything to say, or don't have anything nice to say, then say nothing.
4. Listen, slightly nod, and say little things like, "Oh, yes," to let them know you are listening.
5. Remember, when you speak, use facial expressions and be funny as usual, but be more serious in conversation.
6. Be helpful. Hold doors, help pick things up, and offer help and assistance when needed.
7. Talk about mature things to people: work, life experiences, and life lessons you have learned, or just about how beautiful it is outside. Notice how they carry themselves, how they dress, and how they speak.
8. Keep in mind, around kids, squat down to their size when you talk to them. Don't act fake when they tell you something that is a big accomplishment to them. Say, "Awesome!" or, "Wow, good job." Kids feel good when you are truly amazed instead of patronizing.
9. Try to use proper grammar and spelling whenever you write, including instant messaging and online games.
10. Keep an open mind. Just because you have never heard of or tried something, doesn't mean you should shut it out or dismiss the possibility. Rather, see it as an opportunity for you to learn about something (or someone) new and different.
11. Learn to control your temper. Above all, if somebody does something you don't agree with, try not to shout or carry on. Instead, let it go if it is a minor matter. If you must say something or disagree with someone, do so tactfully and in a conversational tone of voice. You'll find that people respond more positively, too.
12. Don't answer, or at the very least, save the swearing for times that really warrant it. Swearing mainly demonstrates to others that you have poor control over your temper. Instead, try learning some other words to show your displeasure with something. Something that's not up to your standards could be terrible, lousy, rotten, crummy, no-good, and so on. Many of these terms will help you zero in on what the trouble is, communicate more effectively, and perhaps even move towards a solution.
    • Try it! You will probably find that people will listen to you better and take you more seriously if you don't swear.
13. Accept Compliments gracefully. If somebody has taken the trouble to compliment you, the least you can do is appreciate it.
14. Take Criticism gracefully, too. Not all of it is valid, but it is often worth giving some thought to how others see you and what you can improve.
15. Be mature and polite online, too.
    • Turn off your caps lock key and capitalize proper nouns and the beginnings of sentences.
    • Think before you post. Have lots of people already said what you're about to say? Does your post make sense?
    • Read and follow the rules. They're there for a reason.
    • Proofread before you post. Use complete sentences
    • Go easy on abbreviations ("ur", "LOL"), slang, and emoticons. A sprinkling of these in an informal setting can add color. Too many can make it incomprehensible.
    • Avoid speaking 1337 when not necessary . This is an annoying habit most people do without thinking.