I posted this in a Mastermind I'm part of sometime ago. I guess it's useful here too. --
Let's say a friend comes to you and say: "Dude, there's this new restaurant in town, pretty sweet, you should check it out." Ok, cut. Flash forward. You visit the restaurant and it's the most awesome-cool-amazing thing that you are aware of in the past century. Nice, huh?
Another friend comes to you and say: "Hey, just found the most coolawesome theater that I've ever seen! It's comfortable, full of nice people, etc etc. Man, you must check it out, like, today. Are you going today? No? Go tomorrow. Please, you need to see that". Cut, flash forward. You visit the theather and it's just a slightly cool theather.
Hmm... there's a problem here.
I don't have a well-defined theory to explain why this happens, but I got some ideas. In general, people try so hard to turn everything into an awesome thing, like, they can't living in a regular world, that it's too damn common the use of hyperbolis. And that's bad, because it messes up the communication: the listener will never take you serious.
Another way this comes up is in the internet. Your friend posts something slightly funny, you like it and comment "hahaha". Another friend posts something still funnier and you like and comment :"hahahahahahhah". And so on. In the end, to express that you're laughing hard at something, you're gonna need a hell of a string of haha's.
But, the problem is not just in talking and writing: body language counts too. If you usually moves too much, never stops your arms and legs, your movements will be automatically less meaningful for people around you. The same thing for facial expressions.
How to correct this
I noticed all this while reading hpmor. All characters expressions are meaningful: maybe because some of them received training in how to manipulate people? That's why I'm interested in mirroring Draco's modus operandi (if you haven't read hpmor yet, make yourself a favor).
- Talk less, more slowly and, when you can (and it isn't awkard), make some pauses  in your speech (btw, this helps with your second language, in case you're using one)
- Move your body less; try to communicate single points (like yeah, nay, etc) with your face. If possible, search for facial expressions images and practice in front of a mirror.
- Recalibrate the scale of your adjectives. Not everything is awesome or horrible: on one hand, it can be fine, sweet, cool, interesting, good, really cool etc, and in the other hand: not good, bad, unpleasureble etc. 
 Quoting directly from "Language Hacking Guide"
"For example, if I need a moment to recall the way to say a key word, I could say "I'm going to the..." [raise index finger analytically, take a step back, breath in deeply as if you are about to reveal the secret of life the universe and everything, and look out the window at the quest that awaits you] "... supermarket! Do you need anything?"
Don't overdo it, though.
 As native english speakers (I suppose). you can come up with better examples here than I.
Request: I got a fascinating email about thinking. I'm sharing my thoughts, but I'd appreciate yours too. It's kind of a difficult question - how do you think? But it's fascinating, so I'd like you to weigh in after reading this post.
Fascinating email from Huy Nguyen -
My name is Huy, 21 years old from Vietnam currently studying in Singapore. I've been reading your blog and I must say you're 1 hell of an inspiring guy! Recently I have been pondering on the topic of mindfulness/self-consciousness and I thought why not drop you an email to say hi and seek for some help :)
My current problem is my thought speed is restricted to how much I can spell the thoughts out (in words and sentence) in my minds. And that'd be really slow. Sometimes, I'm able to speed-thinking (if that's the right word). I don't actually need to spell out the words in my mind, just link to some picture/scene and somehow I'm able to articulate and understand the situation in my mind. But this is a very rare case and I'm not fully able to control it. Have you ever encountered this problem? Do your mind think in English as well, or some special-made brain language?
Here's a link for you that may really help you to develop as a clear-thinking person: http://www.cs.auckland.ac.nz/~andwhay/postlist.html.
What is it? A list of Eliezer Yudkowsky's blog posts in chronological order over a period of about two years. It's nearly six hundred (600!) posts long; he challenged himself to write every day, for at least a large chunk of that time.
Eliezer Yudkowsky is a man who works with two extremely cool things. One, he works with artificial intelligence (AI). He has an extremely strong grasp of math and logic, and works on advancing the field. Two, Mr. Yudkowsky works with CFAR, the Center For Applied Rationality. It's an organization that aims to teach the art of rationality to willing students.
He also writes the fanfiction Harry Potter and the Methods of Rationality, as a sort of introduction to the art for people. HPMOR is actually quite educational and a very gripping story. if you're normally not big on fanfiction, I recommend giving it a shot just for what you can learn; I've heard some people say it's also a read that motivates them. If you like fanfics, or if you like Harry Potter, I think you'll enjoy it! Lots of little references, jokes, it's really quite captivating.
I've been reading HPMOR for a while, and known of Mr. Yudkowsky's posts for a while, but only today did I stumble upon the list of his blog posts, and realized how massive it is.