(1) I'm lazy. XD
Sounds like the first thing you need is self-discipline; it's hard to improve rapidly without being able to keep oneself on track. Overcoming this is probably the most important thing you can do -- I'm still getting over my feeling of "artistic laziness", but now that I'm more demanding of myself, I'm noticing speedy gains.
(2) I haven't find any article that, really shows what I want.
This site is pretty invaluable:
http://www.posemaniacs.com/We also have an anatomy thread in the "General Discussion" part of the fora where you can post your progress

(3) I mostly do monsters, and non-human stuff, which is why I base myself on, my own made bones and stuff, but I have come to realize, It's still needed.
I think you'll definitely find that working with human anatomy will help with forming arbitrary monster anatomy; you may even want to work on the anatomy of other animals.
- Colors, I, I can't find it so that this color goes good with another, I am still very lost in colors, but I hope to improve.
Learning basic color theory isn't as hard as learning basic anatomy (at least, in my opinion thus far), partially because there are a lot of resources out there that can help you practice and move forward quickly. I found that it was both fun and enlightening to recolor a lot of the pieces in the PixelJoint hall of fame. It's also helpful for figuring out how many of them pick such great combinations of colors.
Of course, it's good to start by understanding the extreme basics:
http://www.worqx.com/color/color_basics.htm- Bigger Sprites, Firstly I started Pixel art to make some art, but small, Now I have come to realize, Pixel art seems small, but it's huge, and it fascinates me xD so I wanna learn more and more. And I want to be able to make bigger sprites, for Portraits or big characters.
I'd advise you practice your traditional drawing skills (paper+pencils), since it's a simple way to quickly get ideas down and get up to speed with the basics. I was recommended this book by many artists here, and I'll recommend it myself since I found it so helpful:
http://www.amazon.com/Drawing-Right-Side-Brain-Definitive/dp/1585429201 It'll help you get on your feet rather quickly.