Wowzers Secondary Animation!

What would the world be like if you couldn't conduct a facial expression while moving any other appendage as it seemed to take up far too much brainpower? Well, flirting would be incredibly awkward especially that wink and wave tactic, don't let your character look like they got injected with too much Botox while their bones got metal plated! Allow your character the ability to walk and wiggle their eyebrows!
Or basically give them the ability to express a personality, unlike all those Plastic characters in shows! (Yes I am referencing Mean Girls) This is the stuff that follows primary action, just a baby detail that makes a WORLD of difference. Like how in South America they have several different terms for a "straw" based on the country, while you think you are asking for a device to drink a liquid through you may be calling someone's mother a goat, I digress. Secondary actions can be as small as a shift of they eye, but again it is important to create your artificial life. Ye animator with a god complex.
Here's how I did this insanely specific precise operation in a program I barely understand to the point it might as well be speaking to me in Cantonese. 
 Now, what you want to do is get to a point where dis boy's noggin be tilted, like so:

LOOK AT THAT SLIGHT TILT, THAT INDICATES THAT WE ARE ON TRACK PEOPLE.
After you have gotten a grasp of what this walk cycle has to offer you would go to the "Show" drop down box and click on "NURBS curves". In the far right corner of your Maya screen you want to click on this bad boy:

The Anim, notice your lack of layers. Onions have layers, and so should all of your projects.

Anyway, basically what you're gonna do is select the head of your character thus making available to you the controls of his facial expressions, the walk cycle is already set, therefore the eye movements and eyebrows are the secondary movements, giving the character the ability to look like he is thinking. He is projecting emotion, which will make a character a lot more relatable to the audience than a character who posses the same deadpan expression through your animation despite maybe being stabbed.

SECONDARY ANIMATION IS IMPORTANT DO NOT FORGET IT.