Pack around a system, not a random pile of items
Organizing gear into categories like shelter, cooking, clothing, and safety makes it much easier to notice a real gap than scanning a single long list, and it also speeds up packing and unpacking at the campsite.
Match gear to conditions, not just a generic list
A checklist is a starting point, not a substitute for checking the specific weather, terrain, and duration of a trip. An easy overnight car-camping trip and a multi-day backcountry trip in cold weather need very different gear even though both are technically "camping."
Frequently Asked Questions
Do I need all of this for a single one-night trip?
Not necessarily — a short, easy car-camping trip close to help needs far less redundancy than a remote, multi-day trip. Scale the list to the actual remoteness and length of the trip.
What is the single most commonly forgotten item?
Extra batteries or a backup light source is a frequent one, since a single headlamp with a dead battery on a dark night turns out to be a bigger problem than most people expect before it actually happens.