Ex1
Photoshop
Space bar + mouse = quick move
ctr + alt = quick zoom

distort = point control/free transform

"cropping" images into another layer's shape - right click on layer whilst holding ctr > right click while in poly lasso tool > invert then delete

Ex1 
finish photoshop stuff

Ex2
coffee cup + stain
bring 2 objects onto the counter top

Ex3
cars
people 

Ex4
books shelving shadowing