In a way I think mindfulness, clarity and self-awareness are all the same thing, but they're not, quite. I recommend figuring out how they're different, examining them all, and then letting them melt into one thing in your thoughts and actions. If you try to melt them together before you know what they are, you might just have a waxy lump, so first... clarity.

From my handy desktop dictionary, on clarity. The third definition is what I'd like for you to think about for self-awareness purposes, but the others are good to consider along with it.

Dictionary

clarity

the quality of being clear, in particular
• the quality of coherence and intelligibility : for the sake of clarity, each of these strategies is dealt with separately.
• the quality of being easy to see or hear; sharpness of image or sound : the clarity of the picture.
• the quality of being certain or definite : it was clarity of purpose that he needed.
• the quality of transparency or purity : the crystal clarity of water.
ORIGIN Middle English (in the sense [glory, divine splendor] ): from Latin claritas, from clarus ‘clear.’
The current sense dates from the early 17th cent.

Thesaurus

clarity
1 the clarity of his account lucidity, lucidness, clearness, coherence; formal perspicuity. antonym vagueness, obscurity.
2 the clarity of the image sharpness, clearness, crispness, definition. antonym blurriness.
3 the crystal clarity of the water limpidity, limpidness, clearness, transparency, translucence, pellucidity. antonym murkiness, opacity.

This is interesting: ORIGIN Middle English (in the sense [glory, divine splendor] ) So in a medieval sense, clarity is Godly. Striving for clarity is clearly striving to be more perfect.

Once upon a time in an unschooling discussion, someone seemed unhappy with the way I used "mindful." For years, some of the regular writers there tried to find a good word for what we were trying to convey— making infinitesimal decisions all the time, day and night, and basing those decisions on our evolving beliefs. We finally settled on "mindful," in the sense of being fully in the moment. Though "mindfulness" is used as a term in western Buddhism, the word they chose when they were translating from Japanese, Chinese, Hindu, Vietnamese and whatever all hodgepodge of ideas were eventually described in English, "mindfulness," is an English word over 800 years old. It's a simple English compound, and has to do with the state of one's mind while performing an action. It creates a state of "if/then" in one.

IF a person wants to live in the light of his goals and intentions, then the "better choices" need to be made in that light. The clearer you are about where you intend to go, the easier your decisions are.

When you come to an intersection, how do you decide which way to go? It helps, before operating a motor vehicle with all its attendant expenses and inherent dangers, to know where you want to go. When you DO have a destination, then each intersection has some wrong ways, and some better and worse ways. It's the same with anything. When you know where you're headed, there are some wrong ways you can avoid simply by being mindful of your intent.

Self-awareness

Master Bela the Kurgan told me this story January 28, 2007:

One zen student said, "My teacher is the best. He can go days without eating."
The second said, "My teacher has so much self control, he can go days without sleep."
The third said, "My teacher is so wise that he eats when he's hungry and sleeps when he's tired."

Sometimes the simplest aspects of self-awareness escape people.

Alcoholics Anonymous has a good little self-awareness tool they call HALT.
When you're feeling out of control, stop and ask yourself "Am I hungry? Angry? Lonely? Tired?" The ideal isn't to use that tool for life, though. It's to grow past the point that you feel out of control, because you've learned to recognize those triggers sooner and to be more serene. An alternate, more humorous but still useful set of words that spell HALT is: Horny, Arrogant, Lazy and Tragic. Being dramatic or arrogant can probably be even easier to resolve than tired and hungry are, for those who know that they want to move toward being more honest, humble and modest. "Honest and modest" is quite a bit like serenity.

Part of self awareness is to be physically self aware.
I've gotten better over the years.

When I was younger I lived too much in my head and would look through the lens of what should be, or could be, or might be, instead of stopping for two seconds to consider what actually, at that moment, was. If I'm not careful I can be cranky before I know I'm tired, and head-achy before I know I'm hungry.

Now, while I'm taking stock of how and where I am, I take a deep breath while I'm considering it, and that one deep breath leads to another one, and no matter where I started, I'm better already.