How do people prevent themselves from getting distracted in long time controls

Music helps a lot if you ask me. Get bored and get your attention there

I have one suggestion for you. when you play slower time controls like 15|10, because you habe time, do not think when it is your opponent's turn to move! many times, when you calculate and think for a long time your brain gets exhausted and you need a break. giving some rest to your brain while it is your opponents turn will help you stay focused. turn on the sound of your laptop or phone or whatever you play on, so that when your opponent makes a move you know. do not look at the board or think when it is not your turn, maybe even stand up and walk around. 

so do I

I took your advice and rn i'm playing rapid and learning how to juggle 3 balls