A packing list is a subtraction exercise

This is less a set of instructions about building a packing list than an argument, and it is worth saying so at the start.

Why lists grow

Every forgotten item gets added to the list and nothing is ever removed, so the list only ever ratchets upward. Each addition felt justified at the moment it was made, usually just after an inconvenience that was never going to recur. Over several years this produces a list describing every trip you might take rather than the trip you are taking.

The result is a bag packed for a composite journey that does not exist, which is where most excess weight comes from. Removing items requires evidence, and evidence requires paying attention to what you actually used while you were away.

The unused-item audit

On the last day of a trip, note down what came out of the bag and never got used at all. One unused trip means nothing, but three consecutive trips means the item answers a problem you do not have. Some items survive this test anyway because the cost of not having them is high, such as a spare card or basic first aid.

Distinguishing insurance items from hopeful items is the entire discipline, and most people file the second under the first. The audit takes two minutes and is the only mechanism that ever makes a packing list shorter.

A standing list beats a fresh one

Writing a list from scratch each trip guarantees that you will forget again whatever you forgot last time. A standing list carries every correction forward, so the same mistake gets made once rather than annually.

Keep it somewhere you will actually open, which for most people means the same notes app used for everything else. Variants by trip type, such as cold, hot, work and long, are more useful than one list full of conditional entries. The list should be short enough to read in full before departure, because a list nobody reads is a diary.

Check categories, not items

Reading forty items in a hurry produces skimming, whereas eight categories can each be checked deliberately. Sleep, wash, wear, charge, carry, document, medicine and money covers almost everything most travellers actually need.

Nine times in ten, each category is a question rather than an instruction: is everything I need in order to charge things in the bag? Categories also catch the item you forgot to put on the list, which a literal item list can never do.

The detailed list still exists as the thing you pack from, while the categories are what you check the finished bag against.

The entries that are not objects

Pre-departure tasks belong on the list too, including check-in, seat selection and any document that needs printing. Home tasks such as bins, plants, heating and post are the ones remembered at the airport rather than before leaving it. Anything with a lead time, such as a visa, an appointment or a licence, should appear on the list weeks out rather than the night before.

On a long trip, a short set of numbers, including cover and card cancellation lines, is more useful on paper than on the phone you may lose. None of these entries adds weight, which makes them the cheapest items the list will ever carry.

When the list is finished

A good list is one you can pack from in about twenty minutes without opening the same drawer twice. It should produce a bag that comes home with everything used at least once, or with a documented reason for each exception.

When two trips in a row need no additions and no removals, the list has converged for that kind of trip. It will drift again as your habits, devices and destinations change, which is why the audit is annual rather than final. The point is not a perfect list but a list that gets shorter more often than it gets longer.

The takeaway

Keep one standing list, audit it against what you actually used, and make removal as routine as addition.

The trip goes better when the bag is boring.