1. Wire up the LED: anode to pin 9. Cathode to a 560 ohm resistor and then to ground.
2. Wire up the Photoresistor. Connect one end of the 10k ohm resistor to the power rail. Connect the other end of it to A0 and one end of the the photoresistor. The other end of the resistor should be grounded. 

Printable Breadboard Layout Sheet