How do I improve my memory and focus?

start with getting enough sleep, eating right, and getting enough exercise
that alone will boost your natural mental functioning, and increase your drive
once you start a serious meditation routine after that you will be a god

>fuck off I do those things
doubt it

Start eating concerta like real men do.

mummy gives me a nice range of meals, before I go to bed I watch asmr and I sleep for 8 hours or more, I do the chink brain calming, I run 5km in 20 minutes 3 times a week

sure you do, post body pic no homo

...

that doesn't show shit, full front with your face and bits censored

concentration meditation

nice quads

Get your heart rate up for 20mins before you study, like on an exercise bike or just run in place or something. It will help you settle and focus cbc.ca/news/canada/morning-exercise-to-spark-kids-learning-1.993446

Once you have that down practice "deep concentration", where you do unbroken concentration for 1-2 hours. You have to work at this as your brain will naturally want to get stimulation from internets/vidjya gaymin/whatever. Go on libgen.io and get 'Deep Work' by Cal Newport.

Once you can finally focus on something for longer than 1hr without being distracted then start deliberate practice. If your subject is math then you deliberately practice solving math problems, with a book like "The Art & Craft of Problem Solving" by Zeitz or really any math book. If your subject is computer science you get the book "Concrete Math" and just work through the problems until you get better at solving problems.

If you smoke dope or drink a lot stop doing so and your memory will improve. The more exercises/problems you do the more you will remember whatever material it is you're trying to do. Also this, you don't always forget everything you read paulgraham.com/know.html