The only problem i have come across is graphics, how did people here learn to make such pretty graphics (silverwind!!)?
Well, I've been drawing cartoons for years so I know a bit about anatomy and structure. At the end of the day though the only thing you can do to get better at drawing is practice, practice, practice! I teach cartoons every friday (though not in the summer) and the thing I stress most of all to my students is that everything is drawn with basic shapes. Practice drawing triangles, squares, cubes, cylinders and circles. (particularly circles)
Of course, pixel art is quite different to other art styles due to the small workspace, and I've only been doing it a year or so. For me it's a trail and error process. I make a rough outline of whatever I'm trying to draw and work on it for hours (often a day or two for entities) until I'm finally happy with it and can start adding details. Then, after what seems like an eternity, when I've finally finished the Goblin, Dragon, Lizard Man or whatever it is, I usually become unhappy with it and start from scratch again!
Eventually I get it right though. Well... most times I do.
One thing that's very important though is to
never delete something you're unhappy with if you're gonna start from scratch on it again. Keep it as a reference. I've still got the original roughs of my human sprites for example.