The only thing not really covered in the link above is Taunts. Use the single taunt, and user it often. Even if you are top threat, you still get a 110%-130% boost on your aggro. Save the AE taunt for the "oh ****" moments, or when you need to snap some things back to you and single taunt is on cool down.
Honestly though you do not want to use your taunt that often as it does not increase your initial threat. What the taunt does is place you 130% threat above whoever currently has threat. Which in all honesty you would think it would increase your threat by 130% but since you are already the highest threat on the target it does not.