First Motion Procedure

Plug in one motor at a time. Turn off power between plugging in motors, and hit reset immediately if motion is incorrect.
Plug in the X motor. Plug in the X endstop.
Move the x axis manually to observe if the axis hits the end stop. The end stop should light up.
Move the axis back away, and hit Home X in Cura.
If anything goes wrong, hit the reset button.
To correct direction of motion, reverse the plug on the RAMPS
Connect the Y Left axis.
Move Y left slightly to see if it moves properly. Reverse the plug if it doesn't.
Disconnect Y Left and connect Y Right -

Troubleshooting

If motor chatters instead of moving, verify that all 4 pins of the stepper motor Dupont connector are inserted onto the motor headers
If motor chatters instead of moving, verify that the wiring order is the same on the stepper and the RAMPS connection

Once all motion has been verified, it's time for the extruder and heatbed.