I have not found the Holy Graal of inter-platform syncing yet, but I suspect that a Palm PDA or Treo might suit you well. Palms integrate well with Macs and Windows and you have a wide range of apps on the Palm for all your needs.

I am in the same situation as you (Mac at home, Windows at work) except that I chose to get a Windows Mobile Smartphone as my PDA choice. While this integrates really well with Windows, on the Mac-verse I am at the mercy of PocketMac or MissingSync, with varying degrees of satisfaction...

Happy integratin' and gtd'n....

sol2k

I have a Powerbook at home and a Gateway Tablet at work -- what can I say, the school district I work for is unenlightened. I carry a T-Mobile Dash (Windows SmartPhone) which I am in love with. I use it only for Contacts and Calendaring and it syncs flawlessly and instantly with our Exchange 2003 server over-the-air (e.g. I never plug it in).

On my Mac at home, Entourage also syncs with Exchange so I'm golden. And all without wires which is HUGE since I hate having to remember to sync all the time.

For notes, etc. I just purchased a Circa from Levenger. I am still experimenting with the "lo-fi" part of my life using D*I*Y Planner index cards for NA lists, Projects, and Potentials, but I think I'd like to Circa-fy those items as well to keep everything the same size.

Good luck making it work for you!

Are you married to the idea of doing GTD-ish stuff on both computers? Because aside from contacts perhaps, you wouldn't need to worry about syncing and software compatibility if you developed an effective paper-based system.

If you'd rather keep it all digital, either a Palm or Windows Mobile PDA would do the trick now that Missing Sync for the Mac works for WM 5.

Don't Excel files go easily between Mac and PC? I know Word files do, so I'm assuming other Microsoft Office software will do the same. So you shouldn't have any probs going between the two platforms and can email the files back and forth between them if you want.

Good point, and if the PDA had an expansion card slot, you could read the Excel files on it too without even having to sync it. Get a USB card reader and you could view the contents of the memory card on any computer.

i use gtdgmail for firefox.

I'm using a Mac at home and Windows at work so I went searching for something that I could use for both. In the end I picked ThinkingRock. It's free, runs on both platforms and saves data as a .xml file so I can either email it between home and work or save it to my memory stick. Oh, and you can print your next actions in the PocketMod format, which I do and then keep it in my Moleskin.

I also make use of the GTD plugin for Gmail (Firefox only), but I end up dumping all of my Gmail into my mail.app at home where I have set up appropriate folders.

I'm using GTD loosely with Outlook at work.

You may want to try the Ready-Set-Do! program I designed for the mac to implement GTD on that platform.

http://homepage.mac.com/toddvasquez/apps

You can send/sync in a couple of ways to take your system with you:

1. Choose "Make Action Lists" to print to paper, upload to web, or email to your work computer.

2. Install the Sync iCal ToDos plug-in and sync everything on your mac (including text of documents) onto your Palm (or other handheld device that syncs with iCal).

3. Choose "Zip My RSD Desktop" and put the newly zipped file of your entire Mac GTD system on a USB drive, iPod, or iDisk and take it with you.

Then when you are working on your PC at work you can:

(i) Look at your paper of actions lists you printed out, or (ii) look at the web-page you uploaded your actions lists to, or (iii) check your work email with your new action list you emailed to yourself from home, or (iv) check your Palm with all of your action lists on it.

Then when new things come in at work you can:

(a) Add a new todo to your Palm, then sync with the Sync iCal ToDos plug-in and it will be added to your Mac to process, or (b) Email stuff to your Mac at home, then save those new emails to your desktop "Inbox" on your Mac you can process there.

If you decide to try this approach out, let me know how it goes. I'm open to whatever feedback or further suggestions you may have.

Todd V

The simplest thing may be to use a designated email account as your project list. Email may be one step away from the ultimate simplicity of .txt files but the near ubiquity of email may make cross-platform life easier.

Next Actions and front burner projects can go into a hipster PDA setup, so capture, minddumping and refining N.A.s can also be ready at all times.

Another trick might be to edit a text file in Writely and post it to a Gmail account. So long as you keep rewriting the same set of text files this may be a way to keep current.

Edit: Going back to your original post I see that you are soliciting specific setup ideas. I use a Palm phone (Samsung i500, you can still get them on EBay and Sprint still supports this small, excellent PDA phone) and keep all my digital GTD stuff in the Palm software, which syncs nicely with Mac and Windows. The Memo, Contacts, To Dos and Calendar can all be ubiquitous and cross-platform compatible. I have a freebie wallet that holds index cards so N.A.s and a set of hot projects are always available to quickly brainstorm on and play with.

Nothing beats a plain legal note pad for "thinking out loud", that's where most of the brain dumping, mapping and colored crayon thinking in general goes.

Hope this is helpful