Projection
Projection is described as subconsciously denying something about yourself and projecting it onto someone or something else. In a way, projection assists a person by helping them avoid that icky feeling accompanied by self-failure or fault. An example of projection could be being extremely prejudice, but refusing to accept that you are by exclaiming that everyone around you is prejudice. Another example would be blaming your mom's unceasing ranting to be the reason you didn't/couldn't do your homework.
"Blame my mom, all my problems somehow root to her."
Regression
Regression is one of most "top-notch" defense mechanisms on this list. Regression is the short/long-term return to childish or immature behavior at the face of a difficult situation. Instead of facing and dealing with a difficult situation in a adult manner, the person may regress back into toddler years. Thankfully for me, we've all be guilty of this and therefore, examples are easy. An example of regression could be a teenager being refused a extension of curfew and reacting to it by screaming, crying, and throwing a tantrum. Another example would be telling your friend to "suck it" after being asked to borrow your car.
"You want my car, do you?!"