Do you remember that girl or boy in your class who draw really good that they made your drawings look as if they were toddler scribbles? On a second thought they really were so, but anyways, was not that such a bummer?
It is not that you suck at drawing, like your drawing teacher used to tell you, but it is only that you use the wrong brain mode. Now, if I told you to draw a human being, the chances are that you will draw the same exact sticks man whom preschoolers draw. These scribbles were most probably what preceded the first alphabet, if not the first spoken language, and some of them are certainly universal.
Preceded the first alphabet: It might be that the first alphabet was an evolution of scribbles. You can scribble a man (or a woman, that would be a sticks man with boobs, long hair, and, in modern times, a skirt) but you can not scribble "town" or "good" in away that everyone else can understand. So we had to find a new way to convey our thoughts. And that is when we started writing or may be even speaking.
Convey our thoughts: This means that your scribbles are symbols, just like "a", or "!". They are abstract representations of the real world when your brain is running in the analytical mode. To be more accurate, they are the transition between the visual and the analytical modes of thinking, albeit more analytical than visual.
Visual and analytical modes of thinking: When we are born, and before learning a language, we think in pictures. It is not like we stop thinking in pictures completely after that. Actually, your ability to predict the trajectory of a thrown ball is not analytical at all; predicting it analytically means solving a set of differential equations, a skill that you can not develop before hitting your 20, unless you were a math prodigy, and even when you can, the method is too slow and cumbersome to catch the ball in time.
Your dreams are "visual thinking" as well. But it seems that we, as babies, soon face a very complex life, and thus seek reducing this complexity by reverting to analytical thinking, which strips an object of all its unnecessary details, reducing it to a word or a scribble that corresponds to a thought in the back of your head! (Before we developed spoken languages, it seems that adults kept thinking visually, but then, how complex their world was? Predators, prays, water and honga honga? Google "the great lakes of East Africa", these are our natural habitats, the shores around them of course)
Your dreams are "visual thinking" as well. But it seems that we, as babies, soon face a very complex life, and thus seek reducing this complexity by reverting to analytical thinking, which strips an object of all its unnecessary details, reducing it to a word or a scribble that corresponds to a thought in the back of your head! (Before we developed spoken languages, it seems that adults kept thinking visually, but then, how complex their world was? Predators, prays, water and honga honga? Google "the great lakes of East Africa", these are our natural habitats, the shores around them of course)
Reverting to analytical thinking: and that is to be blamed for your scribbles. When you want to draw a human, you will always draw that stick man (or woman if you were a pervert or feminist). What you need to draw, is lines, spaces, colors, depth... etc, and not a man. But it is easier said than done. Now look at the following statement and try to see it as lines only, stripped of its analytical information content:
"Green cats are cool!"
It is very hard, not impossible though. And if you started imagining that each letter is another object (e.g. the "r" looks like a street lamp) then you are still doing it wrong, but you are on the right way. You should see them as lines, and spaces. It is hard because we are so used to operating in that dull analytical mode of thinking which tries to pick on analytical information (e.g. meaningful patterns) from anything it sets "eyes" on, and reduce it to that. But you can do it.
You can do it: Practice! Look around you and try to see the visual elements in that monitor, and not its function or name. If you are a parent who want to teach her kids drawing, then 8 is the proper age. Why 8 and not any younger, because before that they are still busy crunching the world around them into "words", and can not process certain visual elements, yet.
So acquiring the ability to switch between these alternative modes is the first step, substantial step, nevertheless. Next, take some drawing classes or read a book, you are not expecting me to teach you everything about drawing, or are you? ;)