Most study distraction comes from two sources, your phone and a restless mind, and you can manage both. The phone is the bigger one by far, because a single glance at a notification can pull you away for twenty minutes without you noticing. The mind is the second, wandering to worries, plans, and random thoughts.
For the phone, do not rely on willpower, rely on distance. Put it in another room or at least switch it off and keep it out of sight while you study. Out of reach beats face down on the desk, because if it is within arm’s length you will pick it up. Turn off notifications, and if you study on a laptop, close every tab that is not part of the task. Removing the temptation is far easier than resisting it a hundred times an hour.
For the restless mind, give it structure. Study in focused blocks of around twenty five to forty minutes with a clear single task, then take a short break, because your brain concentrates better when it knows a break is coming. Keep a rough page nearby, and when a random thought or worry pops up, jot it down and return to it later instead of chasing it. A tidy, quiet study spot helps too. And accept that focus is a skill that grows with practice, so it gets easier the more you train it.
Example: A student who leaves their phone in another room and studies in forty minute blocks usually gets more done in two hours than one who studies all evening with the phone beside them.
One practical tip: Physical distance from your phone is the single most effective focus fix. Another room, not just face down, changes everything.