As someone who carries a laptop around all the time and on every vacation I have never worried too much about keeping everything accessible beyond the local machine I have (currently a MacBook Pro).
Recently I started thinking about migrating to online tools where possible. For example I started using Google Reader over NetNewsWire so that I can check in on my feeds from any machine. So now I can get a quick RSS fix before bed on the iMac at home rather than pulling out my laptop. This was a good example because while NetNewsWire has a sync option with Newsgator Online it isn’t as robust as Google Reader and my goal is to ultimately not depend on the particular machine I am using to get to what I need.
Another move I made recently is leveraging the Gmail storage for my email archive. We use Exchange server at work but with any client these days I can add in the Gmail account via IMAP and use its capacious storage to house my archives. I have run into a few kinks but all in all the process is working for me. Now I can sit at a PC or my MacBook Pro or my iMac at home and have all my email.
The next step will be to move my documents to a similar setup. I have a .Mac account so that is an option and I have started looking at other options to keep an online (and ideally redundant) store that will keep everything in check. While I have a few apps that don’t span platforms most of the files tend to be cross platform (think Excel and Word) so having them available anywhere is another big win.
One reason to start thinking about this is that I have found myself tiring of carrying around a complete mobile office. If I can get a majority of content shared and synchronized across multiple machines I can travel light during the week and even start to consider a lightweight machine to use on trips.
I haven’t quite decided if that is the way this will end, but at least I can downsize my daily bag and hopefully open it less often.