Drawing Tips!: Start your drawings light and sketchey, this makes correcting mistakes easier, and you may find that you draw better when you work quickly and don't overthink the shapes you are trying to make.
That said, think about all the smaller shapes that make up any object or group of objects and concentrate on how they fit together.
Make sure you spend plenty of time observing and studying the things you want to draw, and don't be afraid to go get pictures of your subject matter to use as "references".
Also: Practice, practice, practice. There's no wrong method to drawing, so find your comfortable style and keep practicing. But don't ever get bogged down with one way of doing things; change your methods whenever you figure out a better way to do something. If you Practice all the time, you'd be surprised how much you will simply teach yourself.