The secret is to learn the basics of drawing and then: practice, practice, practice. I'll quote an earlier response I gave to a similar question on this thread: http://bodyinflation.org/index.php?name=Forums&file=viewtopic&t=747
Do you know the basics? Ask yourself these questions:1) Do you know what the vanishing point(s) is(are)? If you can't answer that with any degree of certainty, go and study perspective drawing and how both it and the vanishing point pertain to spacial orientation. It's a simple concept, but one that must be practiced, understood, and then practiced, practiced, and practiced more - pages and pages and pages and drawing tablets full of practice. An understanding of this will open worlds to you - well beyond what we're discussing here.
2) Do you understand what the proportions of the human figure are and how the underlying skeletal and muscle structures affect it? Do you understand how gravity affects the body in various positions? Do you understand gravity? There are lots of materials, both free and not, that can teach you this. Despite the physical differences that exist from person to person, the human body tends to conform to certain proportions. Until you understand this, you will never be able to develop any kind of "style" that can be taken seriously. Can't afford figure drawing classes or a figure drawing book? Can't figure out how to search for it on the web? Then start by drawing those around you. Look in the mirror and draw yourself. Look for and study the commonality between people - head to toe. Here's a little test: if you can study and practice hard enough so that you can draw a human hand in any position and to affect any gesture, you are well on your way.
Once you've got a handle on those two subjects, you can begin to combine them with other elements.
- Light: Study how light interacts and reflects with objects. Start out by drawing simple geometric objects like spheres and cubes and practice shading them. Then apply what you've learned to figure drawing.
- Cloth: study how cloth hangs from various objects in various positions. Draw the drapes. Throw a sheet over a table that has various objects on it and draw what you see as accurately as you can. This a type of "still life", and is a good exercise which teaches the student how to combine various basics.
- Color: learn how and why the colors that you perceive in a painting aren't necessarily the colors that are really there.
- Mediums: learn what you can do with various mediums and how you use them. Pencil, ink, oil, and water color all require different approaches. Be able to do this in the physical world before you try it on a computer.
Once you understand these basics and can demonstrate so (especially #1 and #2), then (and only then) can you truly begin to develop a style of your own.
And lastly - practice, practice, practice the basics, even after you understand them. Apply the basics to anything you draw.
There is an enormous amount of free material available on the web to help you. Wikipedia is a good resource that will help explain concepts and on Deviantart there are many, many tutorials.
If you cant draw, try Writting, its easier if you know what people like, and you like.