I've been messing around with The Hit List open beta, and the one feature I've fallen in love with is that THL automatically creates an inbox todo when you drop a file onto the application (or onto an open THL window).

If the file is x.pdf, the todo is Look at "x.pdf." And of course it attaches the PDF to the todo item.

It's really helpful for someone like me, who has lots of files that I want to sort for research and writing projects.

--tom