This is much healthier than what I do.
I load up all of my weight and stare at it in dread.
Then I'll pace back and forth on the platform sipping water and looking at my flexed/unflexed triceps in the mirror and reflect on my previous squats until I've noticed an absurd amount of time has passed. Then I get under the bar and squat. This is unique to the squat and no other lifts qualify as a Significant Emotional Event.
I'll give your method a try and let you know how it goes