Writing On Smartphones/Tablets
Though I've posted about cool apps and word-processing alternatives for smartphones, I don't recommend writing your first draft on there. If anything, I think touch-screen technologies are good for taking quick notes when a notebook isn't available and you definitely don't have time to whip out your computer, start up your word processor, and flesh out a passing idea right there.
You know those ideas that are just a few sentences but so sweet, you want to remember them? That's what these apps are usually for.
When I'm stressed out, bored, or genuinely inspired/in a writing mood, I use apps like MobisleNotes or Evernote to write up little scenes or entertain ideas. Sometimes I rant to myself about characters or frustrations with my plots and save those for future reference.
A fun thing to do with smartphones/tablets is this:
Write up your story on the computer
Convert it to PDF (some word-processors have this functionality built in. I know IBM Lotus Symphony does)
Download it to your phone (via a USB, email attachment, Evernote attachment, or saved document in Dropbox for mobile download)
Open it in something like Adobe Reader
Edit, highlight, write notes to yourself
The cool thing about the Adobe Reader app (speaking for iPhone, can't really speak for Android anymore) is that you can highlight, leave typed notes, or even hand write a note. I use this to mark up some of the short stories I download in place of buying the textbook for one of my English classes. It's very helpful!
Chances are if your story makes it big, it will not only be in typed print but also in digital format. E-Books are a big thing and being able to see how it would look to the digital demographic can be a great aid.