A bowl by the front door for the phone does more than any resolution about willpower. The point isn't discipline. It's distance.
Can wait is a kinder framing than must be given up. The show is still there at nine. The distraction was never the enemy; being unable to choose when it happens is.
There's a joyless version of this and it doesn't last past February. Build the hour of work first, then let the evening be an evening. Both are allowed inside the same day.