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The nice thing about online spreadsheets is that it can be edited in real time. My sister "X"ed the items that she already had (e.g. diapers since she has a 1 year old) so it cut down our space by half - just enough space for those last minute gifts. My husband and mom could also review the lists on their PDAs and add to the baby items and help me pack various shared items that I might have forgotten.
There are plenty of other website that also have travel lists. Hopefully one of them will work for you.
General packing advise:
- Getting Things Done Travel Checklist and Travel Checklist - Ladies Version
- Romantic Getaways from Susan Breslow Sardone from About.com
- WikiHow's step by step instructions on How to Decide What to Pack
- and our beloved FlyLady who give some practical advise for those with little time and have procrastinated on packing until the very end.
- TripAdvisor - Each country has an advisory on what to pack. Just type in a country and click on the "Before You Go" link on the left hand navigation bar. Example: Thing to pack and NOT to pack for a trip to Cuba.
- Lonely Planet - Similar to TripAdvisor, but you have to do some digging for specialized packing lists. Example: Packing list for Asia
- Lastly (or perhaps first thing to check) is a simple Google search on "What to pack [insert destination]" If you every take a trip to my home state of California, here's a pretty good search result on packing lists for the Bay Area based on community feedback.