Test Chamber 1
Lift a box using the funnel. Note: Make sure you are on the lower section. Using its now gained height, throw it at Wheatley.

Test Chamber 2
Same as Test Chamber 1.

Test Chamber 3
Same as Test Chambers 1 and 2, but make sure you are in the first section of the chamber.

Test Chamber 4
Pick up the turret behind the button and aim it at Wheatley. It will not shoot until released, setting it upright.

Test Chamber 5
There are two monitors in this chamber. Both can be smashed by lifting a box in a funnel and throwing it, however the exit portals are in two different locations. The monitor first is on the wall in which the funnel is being projected on, around the center. This will require some experimentation to get. The second monitor is on the very right of the angled surface that you go through on your way to the exit.

Test Chamber 6
Launch yourself on the Aerial Faith Plate.

Test Chamber 11
Burn him with the Discouragement beam and the Redirection cube. You will need to use the box to get the beam on a Portal conductive surface, then use portals to get the beam to hit Wheatley.

Test Chamber 12
When you are where you would normally use the cube to open the door, burn the monitor.

Test Chamber 15
Do the same thing as Test Chambers 1, 2, and 3.

Test Chamber 16
Note: This will require several attempts. Do the test normally. Save the game before the part where you coat turrets in Repulsion Gel. Only coat two of the turrets, leaving one alive. Save the game again. Using one of the portal surfaces on each side of the turret platform, jump on the platform while pressing [Crouch] to avoid bouncing on gel. Grab the remaining turret and use it to shoot Wheatley. Consider going behind the black strip of wall in front of the turret after you bounce the other two. Wait for him to begin shutting down then run out and grab him. By doing this, you can get him during the time required to close himself and re-open.