The biggest impact is the tone of your thoughts, and the tone of your inner voice and the tempo of your inner voice.
Right now you're reading this and you're reading it with a specific tone of voice, but you could choose any other tone of voice and rhythm and it would have a vastly different effect on your physiology.
Try reading while rhyming in a kind of child's game, or reading it whimsically as if to exaggerate the lows and highs for every word, or reading it with a loving tone of voice like a feminine voice. You could change your inner voice to be a womans voice.
There are a lot of studies where they analyzed people's inner voice, and they found that there's a huge correlation between inner voice and anxiety, level stress level levels, and the quality of the person's life.
And the thing is, this is fully controllable.
You could impersonate a highly loving, caring, gentle woman's voice, and you use only that as your inner voice to do all of your thinking contemplation or reading or daily operations.
Also, the rhythm of your inner voice place a huge role, if you start off with a whimsical rhythm, you quickly find that you'll enter into a play state and your whole physiology will change into a play physiology and it allows you to enter into the zone much easier.
Your inner voice directly correlates to how fluently you enter into the zone.
This is where mantras are actually useful, a mantra has a specific energy. If I say the word. "My love" internally, it invokes the vagus nerve and warms the solar plexus with good feelings. It's similar to the inner smile, simply smile internally, and you could feel it changing your physiology. There's also the word "control" which facilitates a pause for about 10 seconds, and then you could repeat that word to facilitate another pause and another resenting. Each of these words has an energy that directly affects a physiological response because there's associations you're making to all of these things.
All of your inner words, tempo are directly associated with your physiology.
And it could all be designed where you self explorer the correct tempo and we have operating and then you simply practised it until it becomes your default network.
You could read in "slow motion", it's all an act. But your body makes it real.

Sure, you guys should strive to make good money. Being poor is no virtue.

The simple formula for Success (Success meaning Happy, Healthy, Fulfilled within, and outwardly successful by doing what You want, when you want), is this..  First Establish Your BEING, you haven't done this at all it seems, BEINGNESS is I live NOW, ACCEPT NOW, and engage my Free Will by determining how I want to be within..  
The above is the main reason why so called Successful ppl are really Failing in life by being miserable, and/or drug addicted or lost!
If You don't establish your BEINGNESS, and then just go out and DO or HAVE like You and most of us have done, you eventually end up suffering.  In the beginning of DOING you feel okay, like "Hey I am going for IT, heading towards my Dream, I feel Good", and then You may actually get something out of it (HAVING), and this makes You feel a bit more better, but it doesn't last long, sooner or later You feel down again, because You haven't established Your BEING.
Do that first, then everything will work out fine, I am working on this right now..I have a job I do not like, it does make me angry and frustrated but I've established partly my BEINGNESS and those feelings of frustration and anger go away very quickly!!

This requires insane motivation and persistence. Not a loser's attitude.

Dude go out and do serious rigorous epistemological study. Once you have spent 10+ years learning stuff contrary to your worldview come back and preach Jesus to us all. You're living in your comfort bubble and aren't questioning anything seeing everything through your Jesus lense because it's safe and you don't have to deal with the difficulties of understanding life for what it really is. All this Jesus content is sickening honestly. Grow up.

This is the illusion and the very reveal that exposes the trap.
This is where the ground and the earth from which you stand is disregarded and you are swept of thy feet with an invisible power that never delivers, rather only provides a false mental bliss, no different than those who abuse psychedelics.
Here is the truth and words of Christ, your heart will reveal unto you what is true (by how it feels) in your being.
"Teach the people to work on the base of their beings,” he was
saying, in a voice that was like a chant. “You would like them to
have wings to fly, while in reality they have yet to find their feet.
If they do not recognize the Earth as the Mother who feeds them,
who nurses them, you may expect that they will spend their whole
lives desperately seeking my Father."
If we deny the Mother (the earth), we deny the very *medium* that allows the Father to be known. In essence, you cannot reach the Father without the Mother. The Divine is immanent in the earth and body; we experience God through life, matter, and presence.
 
 

100%

This is more related to connection I think - you perceive you can attain happiness through the connection with a partner. 
But in reality - it is the true connection with yourself you require that you cannot feel. 
Once you connect with yourself, love springs from the seeds of experience shared with another. Without the neediness of thinking they can supply what we do not have. What ends up being created between - experience - is the font of love.
Stems from society telling us we are not enough. We need another to be whole. So you end up with broken pathological attached love being represented as the aim. They sell you something by creating a percieved lack. Insidious.