How to access individual items in $form_state['values'] post-submit Question

After a user has a submitted a form how do I determine how to reference individual form field values in $form_state['values'] ?

Examples

For example, I have several fields in my form, such as 'field_organization' that would normally be accessed (for CSS) purposes, like so:

$form['customer_profile_billing']['field_organization']

I have others in my form that have even more convoluted paths such as 

['und'][0]['another-name']['a-fourth-name'], etc.
You can access $form_state['values'] of a field in like 

$variable = $form_state['values']['your_field_name'];


After saving you can access like this

$variable = $form['your_field_name']['und'][0]['value']; 


For more information please check


$form_state keys
What is $form_state used for ?


Hope this will help you.