Boredom is the key to solving this problem. Exert control over yourself, do not let yourself do anything other than the task. No watching videos, no reading of

Boredom is the key to solving this problem. Exert control over yourself, do not let yourself do anything other than the task. No watching videos, no reading of either web sites or books, no checking the phone, no listening to music. Nothing. Eventually the original task will be a pleasant relief. Basically you're increasing your interest in the activity relative to other tasks rather than trying to increase intrinsic interest in the task.