This means that drawing is not some magical activity that some people are born with the ability to do.  A skill is something that can be taught and most importantly-learned.  If you want to draw, draw better, or draw as a professional- you can. Anyone can become skilled at drawing.  Don't ever say, "I can't draw." 

Gather photos or better yet take photos of objects if you can't draw them in person. Some people may forsake me for this one. It's just not possible to draw everything from life.  So when you can't be in the African Savannah to draw that lion, use a photo or three. Here are a few photo references to get you started...

Everything in the world can be simplified into basic shapes.  When you are studying your subject, try to pick out the basic shapes that make up the over all shape.  Usually these shapes are pretty easy to draw.  Draw the shapes then draw the contours (outlines). ( This tip will help you with your speed as well.) Here's a closer look at what I mean.