This video shows how to draw using the two point perspective technique. Look how quickly the objects come together...does it look that hard?!
Using two point perspective allows you to create shapes and objects really quickly. Have a look at is doodle...
In no time at all you can have a page full of great sketches, using this simple technique. Have a better look online for some more video tutorials and ask your teacher for a demonstration. You'll be surprised how quickly you'll pick it up!
If you're a bit more confident, check out these sketches...
With a bit of practice...