Get an inexpensive sketch book and keep it next to this book.
Draw at least once a day… and every time you get a chance.
Use pencil or pen or Crayola or anything that can make a mark.
Learn to find basic shapes within an object: circles, squares,rectangles, triangles, ellipses, ovals.
Learn to judge the right proportions of each shape.
Learn to see the relationship between shapes. Where does a line fall in relationship to other lines or shapes?
Check the angles of lines and objects to judge how inclined a line is.
Once to train your eyes to see these relationships and proportions, drawing them will be easy.
You learn to draw by drawing… start drawing NOW!