I believe it's something that needs to be trained, where it helps that you are feeling well physically, and also that there are some things that are actually de

I believe it's something that needs to be trained, where it helps that you are feeling well physically, and also that there are some things that are actually detrimental to concentration ability because you train the opposite. Spend time focused, build more of that ability. Spend time clicking from news headline to news headline while receiving notifications of everything under the sun, build more of that. All the things people list either make you physically better (like exercise and good sleep), make you focus, or make you do without the constant distractions for a while.