I use DevonThink. It's an incredible piece of software. I have a database for 'research' where items are stored according to the Dewey Decimal categories (no p

I use DevonThink. It's an incredible piece of software. I have a database for 'research' where items are stored according to the Dewey Decimal categories (no particular reason for choosing this other than it's well organised and well documented). I then have a separate 'memex' database which contains my journal and other miscellanies. DevonThink has a rudimentary AI system which attempts to link documents by context. I find it quite useful.