STick figures and shape additions are definitely the way to start. ONce it clicks in your head how itworks, you won't ever give it up. I was trained in school that way.. it was very difficult to switch from my old ways of drawing.
Practice drawing stick/shape drawings off of things that are true to life. A live model...animal..human...plant..or purrhaps a photo. It's even great to try reproducing cartoon drawings in the same manner. Also, what i like to do is make big honkin' pages of nothing but...say..hooves. If I feel like my hoof-drawing skills are crappy,that's what I'll do.
That's how I learned to draw birds,actually..
I created a bird character for use in a character design class,justbecause I knew I sucked at birds, and I knew I'd haveto be drawing one for 50,000 times a day. needless to say, my beek drawing improved greatly.
..but yeah.. anyway..I'm at work and I forgot what else I was gonna say.
hehe,type you later.