Quick 50 Writing Tools: a list of a few useful ways to write
TvTropes: a catalog of the tricks of the trade for writing fiction— the last word in story deconstruction. Search just about any film, show, or book and find out the tropes used in that film/show/book. If you’re looking for a great first search, try Twilight: SOOOOoooo many tropes!
Storify: You see a bunch of things, you create a context for them, it becomes a story.
Merriam-Webster: Occasionally biased, but definitely useful for American English. Often features etymology with the definition, if you need to know about when a word came into use and in what language you can find its roots. (This is of course an American dictionary. If you happen to know of any great dictionaries for languages other than American English, please let me know)
The Online Etymology Dictionary: basically a thesaurus of meaning. Smartly pulls up not only the searched word but a list of related words as well.
Purdue Online Writing Lab: writing basics you may already know but wouldn’t mind re-reading
In Search of Serendipity: an amazing article detailing the importance of keeping yourself open to new ideas.
Smarthistory: a massive online Art History textbook; insanely useful for research (and if you’re a history buff, it’s just plain fun)