I need a good sort out

Over the years I've used a whole bunch of web tools for different things. The tools I use most in both a work and a non-work context are:

• Remember the milk (my to do list, which I've blogged about here, and use for a modified Getting things done system)
• Evernote (for notes - especially from meetings - and things to keep for reference, in particular photos of hand-written notes)
• Diigo (for bookmarking)
• Google Drive (for creating and collaborating on Google Docs and storing other documents)
• Dropbox (for storing and sharing documents)

One of the keys to their usefulness is that all work well on mobile, tablet and desktop and sync seamlessly across these platforms (apart from Diigo - the apps for which aren't great and I find it only works really well on a desktop - so I email to Diigo and tag later). I use GoodReader on my iPad to view documents offline (it syncs with Google Drive, Dropbox and Microsoft Exchange) and is particularly good for annotating PDFs.

But before I leave for Bristol I need to do a good tidy up of all these different tools. How I use them has evolved, and the tools themselves have evolved as well, so which one I use for what has become a bit blurred in places. I especially need to sort out my tags and notebooks in Evernote and decide if I need to use Dropbox at all or whether I can just use Google Drive.

Does anyone have any tips?