The actualization of Anatta Having attempted to understand the actualization of Anatta, i am at a complete loss. The more i endeavor to understand the meaning, the more confusing it seems. 

I have read;


What is the best translation of Anatta into English?
What is the precise meaning of anatta?
No-self Not self


My understanding to date is that it not-self is to detach from the 5 aggregates. So to use an example. If i express anger or sadness, i should look to detach or disassociate myself from such emotions. This may be through meditation or mindfulness. 


Is my understanding correct? If incorrect, please use lay person examples that will allow me to relate or understand.
Are meditation and mindfulness the only methods of actualization?
i express anger or sadness, i should look to detach or disassociate
  myself from such emotions.


Not! Stop hypothesizing and simply observe the events/experience at their unsullied form.
When you say "I express anger", it's already sullied. You have assumed the existence of an 'I'. Anger is anger. So simply notice it as anger. Not 'I'! Same with sadness and other emotions. Don't look to do anything with them. Just observe and see if they qualify as an 'I' or 'self'. 


  Are meditation and mindfulness the only methods of actualization?


There's no actualization required. Anatta is already actual. It's similar to saying "how do I make the world round?". It's already round, you just need to realize it.
Satipattana meditation is the only way to purify the mind. Buddha called it the "Ekayano Maggo".The one and only way.