Got a favorite writing resource?

To answer the question, I don't. Not currently anyway. I have only a few things I keep handy when writing, and I don't use them as often as I probably should. But when I do pull them off the shelf, they're not very helpful. My grammar book is a college textbook that doesn't explain anything very well. My thesaurus and dictionary don't always have the words I'm looking for. (What's up with that?)

I think it's time for some updating, hence the question. If you have a favorite, I'd like to know. I've been trying to find a good grammar book and there's so many to choose from. Perhaps it doesn't matter as long as I have one. But if you have one you swear by, post it below please.

I wish I had something to offer in return, but I don't. Instead, this is just me asking for help from all you wonderful writers. :)