Frederico Viticci shared his writing workflow. I too centre my files around Dropbox. My preference for writing app on iOS is iAWriter and I don’t use Evernote, I’ll write about why an everything bucket just hasn’t worked for me some other time.
I use Instapaper to store article I want to read and maybe write about. I often read them once on my iPad then if they are worth writing something on I will read them a second time while I write in MarsEdit. I send them off to my site (powered by WordPress of course).
For some reason my longer articles are often started on my iPad in iAWriter. I usually keep them there and work on them from my Mac and iPad as I have time.
Even when you think someones workflow is totally off base, it’s great to read them so you think about ways to change your workflow up and be more efficient.