Step 1: Go get stuff
Step 2: Microcontroller pins
A chip that has been properly inserted into an Arduino socket will have pins which are straight (at a right angle to the body of the chip). The chip in the middle is an example of this.
Unfortunately, chips that have been through the process of being forcibly inserted and removed from a normal socket sometimes end up looking like the chip on the right. Notice the pins are bent in every which direction.