What should someone with ADD and ADHD do in order to sustain proper focus?

My friend has ADHD and she has to take certain medication to be able to keep focus on what she is doing which can be hard for her but something that she does to keep focus on her homework she goes to the library turns her phone upside down and turns off her ringtone expect for her parents and just spends time doing her homework it does a bit longer but that is just the way that best suits her, she also needs to make sure she eats a good breakfast which her mom makes for her everyday.

Explanation:

answer; the above is true;

for me i have felt invisible when i was clearly struggling,or,i made a great achievement ,and,nobody took to notice me either because they just didn't see it,or,people just turned their back on me.i can see a person being invisible by choice,or,without choice like i did.the people who are invisible by choice don't try to talk to people,don't try to make friends,and,keep to themselves.i haven't been one of those people so i couldn't give you a reason.

hope this and can i get bainliest my dude : d