What I do is put on my headphones and play some repetitive music. Most of the time I stick to metal, techno, or ambient, and it’s usually in another language so I’m not distracted by the lyrics. I don’t know if that would work for anyone else, but I tend to have issues focusing on anything without some continuous noise to block out all the other distractions. -le shrug- Writing when everyone else is asleep works pretty well too, or if you can find a place in the house with less noise. I room in the basement just for that reason.