Classic yogi diets are highly recommended for clarity of mind. Which means:
No animal protein No dairy No sugar No onion, no garlic, no potatoes, no tomatoes, no hot peppers No wheat No boxed or processed foods No caffeine, no alcohol, no stimulants As much raw, uncooked food as possible As much organic as possible It's NOT an easy diet to maintain long-term in our society. You will be hungry a lot and it will cost you about double or triple what the SAD diet costs.
If you're gonna eat animal protein, fish is best, then pasture-raised eggs, and lastly pasture-raised meat.
The upside is that your clarity of mind will skyrocket! A lot energy is wasted on digesting the wrong foods.

You kind of need to take all of it at once. Even if it is really expensive. But once you have a certain count of substances and supplements they all work together and potentiate each other.
For a cheap and slight improvement just add
Moda Get them in bulk (100+ pills) from where you would also get your other "helpers" I got mine for a price per pill of about 90 cents  Mostly I only use half a pill a day If I take this every day it still costs me less than 20€ a month Nothing even gives the same bang for the buck Add the precursor of Dopamine Moda is technically a Dopamine Reuptake Inhibitor So theoretically you shouldn't deplete your Dopamine But it helps L-DOPA There are not many supplements for this Mucuna Pruriens Kindof expensive and not many sites have it You can also eat chocolate But with a high percentage (80-99%) The others have too much sugar Sugar is shit Don't ever eat it or add it to anything Don't eat any sweets  Food is naturally sweet Once you cut sugar you can actually taste your food again Take extreme care of your dopamine reward system You want to keep the baseline line low Don't go out seeking a higher high every time Look at what you have now and be grateful When you are not happy now you are not going to be happy later The future is going to be the now some time Don't put anything in your body that is going to mess with your dopamine No Nicotine No porn and masturbation Sex in moderation. It drains the male body too much. Try to not cum and only do it if she has really deserved and worked to get it. No sugar No amphetamines No cocaine or speed No carbohydrates, fruits, cake or sweets ALCAR Acetyl-L-Carnitine Another super cheap powder Increases performance (+8% in some study) and bloodflow to the brain Add precursors to Adrenaline and Noradrenaline N-Acetyl-L-Tyrosine Get the powder Its incredibly cheap I paid 15€ and haven't finished it yet Have had it for over a year Dopamine

Looking at this you can add the required ingredients for the dopamine metabolic pathway to work at its peak performance List of helpers Fe Eat meat or add this as supp P-5-P Supplement this at night SAM-E Supplement in morning Serotonin

Here goes the next big neurotransmitter ==> Serotonin Is needed for Melatonin Makes you tired and sleep deeply You want to align your circadian rhythm If its offset you don't get the high level of Cortisol in the morning and need caffeine Supplements 5-HTP At night P-5-P You already take this for the dopamine pathway B12 Eat meat  Magnesium Citrate It continues
As you have too much money, you continue adding things Creatine Because it works and is cheap Just another source of energy Vit D3 and K2 Why not Especially in the winter Iodine for the Thyroid Another part of the body involved in energy Now that you have so much energy you don't know what to do with it anymore Lithium-Orotate to take the edge of a bit Huperzine-A Expensive, a bit But if you are too rich its fine Maca Cheap Anything that helps keep it up is worth it imo Fishoil Its cheap An animal has to die for it This makes it worth something imho You are running around and need your joints to work  
Booster during the day
NALT ALCAR potentially Caffeine  
Going down the rabbit hole
Because the previous stuff has worked so well you continue You find Racetams Piracetam Fasoracetam Oxyracetam Phenylpiracetam Sunifiram Noopept Semax Selank Most of these just give you headaches and are really expensive In the end you don't use these very much  
Microdosing LSD
This is cheap Every 4 days  I have started this week and am actually on a double dose of it right now This has the potential to have a similiar bang for the buck as Modafinil Now that you have spent 1200€ in the last year and over 2k since you started you can make a post about and pat yourself on the back.