>>11754373Start eating healthier foods.
Exercise at least 3 days a week.
Maintain good hygiene (dental especially).
Learn an instrument.
Learn programming.
Learn a second language.
Stop coasting through life on dopamine highs. Dedicate some time to study and challenging yourself. Use kahn academy if your starting from nowhere.
Read more, every single day.
Lastly; meditate. If your religious, you might consider moments of meditation as spiritual.
Anyone can become smarter anon.
It's up to you to pursue your goals in a meaningful way, and to self-discipline where necessary.