What is a better way to shade and add a 3d look to a drawing?

 pick an angel of where you wan the light to be shining and then shade dark going into light facing the light spot

Explanation:

look at the images i  drew them all and they show a good idea of what i said. especially the cube stack.

P.S.

dont forget to make a shadow  

true

explanation:

"on his third studio album, forest hills drive, j. cole forms his most personal work to date, cultivating this into the best hip-hop album of 2014."