I put current versions of record-keeping files into a folder on my computer and into the dropbox folder. I also put any file I need to read (PDF, academic article, material for a conference e call) into DropBox since every app I use on my iPad or iPhone can access DropBox. For general cloud storage of practically every file on my computer, I use SugarSync which syncs within minutes every file as it's changed on any computer or my iPad. So DropBox makes accessing current files easy from any app - SugarSync is my preferred storage syncing solution for my computer HD (everything except iTunes music, apps, videos, books, audiobooks because those are stored on the Apple Servers or Audible servers and I can access them whenever).