One way to prepare for Scrivener’s iOS release is to begin to write on your iPad or iPhone now using basic text apps. There’s a website that takes up the topic here:
The focus is on academic writing, but it’s helpful no matter what sort of writing you do.
I don’t write that much with my iPad, since I can get AC power for my seven-year-old MacBook at the library. But if you like to write for long period of time away from AC power, you might find that an iPad means you don’t need a laptop.