Packing should take 30 minutes. Instead it takes three hours because you can't decide what to bring, you get distracted folding, you realize you need to do laundry, and suddenly you're reorganizing the closet. A backward plan from when you need to be in bed gives each packing step a time box so you actually finish.
Packing is a chain of open-ended decisions: what to wear, how much to bring, what you might need. Each choice is a micro-stall. You hold up two shirts for five minutes. You check the weather three times. You wander into the bathroom and forget what you went for. The task expands because nothing is timeboxed.
Ready Time works backward from when you need to be asleep. Clothes: 15 minutes. Toiletries: 10 minutes. Electronics and chargers: 5 minutes. Documents and essentials: 5 minutes. Final check: 5 minutes. Each step gets a notification. You don't need to make perfect choices. You need to make choices within the time box and move on.