I find this tip very helpful

[pioneer]

Create two checklists for travel â€" one for the office and one for home. Laminate the lists and keep one in your desk and one in your travel bag. The basic trip requirements are the same and this will help you double check that you have everything you need.

[PrincessSaDagat]

How about this, Mike.  Create a check list in your computer and save it for future use. This way you can change and/or add along the way, yet when you are done you can email it to yourself so that you can access it in your office and print where its available.

[pioneer]

prinses, my checklist is filled with passwords and usernames. i'm running a number of websites, so, this data (checklist) is really important to me wherever i am.
I have a 120-GB external harddisk (small and handy) for some must-have files.

[PrincessSaDagat]

Holy wakamoly! okay, you are way ahead of me on this one.