Comment by gaspoweredcat

the most helpful thing youll do is getting that diagnosis and finding the medication that suits you which was a game changer for me (initially i tried methylphenidate (ritalin) but it was a little too "up and down" for me, it seemed to tail off before my next dose was due but i then switched to lisdexamphetamine (Elvanse/Vyvanse) which has proven incredibly effective)

before this i generally got through by having multiple tasks on the go at once, pick a reasonably simple task and a complex one and regularly drop from the complex task to the easier one, a good example for me is updating my commenting on other bits as im pretty terrible at adding it as i go, i cant say this will work for you but it helped me.

the only other thing i can suggest is to try and reduce your possible distractions for which headphones are helpful ideally with instrumental music, background conversations and words can trigger your mind to go off on a different path

basically try and reduce things that may distract you and try and keep other tasks ready so that if you do get distracted youll fall onto other work which keeps you productive but as i said before i cant promise these tricks will work for you as everyone finds different coping mechanisms work for them