For capturing and sketching out ideas, I start with Evernote, because it’s quick, easy, and accessible from every word-writing device I own (smartphone, tablet, laptop, desktop, public computer at the hotel, etc.). My mind is like a little magpie, always distracted by the shiny new scientific discovery, fictional civilization idea, snippet of dialogue, character note, cool name, or other thing I should remember. I don’t lose them with Evernote. I could wish it did a few extra things, like allow sub-notebooks, or more formatting for the web version, or easier download/backups of the Web version for we-who-are-paranoid, but those complaints are minor. With the Evernote client application version, you can even work offline and sync to the master content on the web once you get reconnected to the internet.