Here's how Charles Schulz, the trailblazing cartoonist who created Peanuts, drew Charlie Brown. I love his sure strokes and how he builds out the character but most importantly, I love how he's done in less than half a minute.
The Peanuts channel also has other videos of other artists drawing other Peanuts characters. This one shows Andy Beall drawing Snoopy:
And Peanuts illustrator Vicki Scott drawing Woodstock: