I know a Steemit app is going to be released at some point. But for the time being, Writing posts for Steemit on the go can be challenging.

Use Your Phone

You can store it in the "notes" app. Or other apps like Evernote. My personal favorite, Is writing the post directly on Facebook using a Bluetooth keyboard like this one
You can type just as fast as if you were on a computer. And post it on Facebook Using the Privacy "Only me" feature. That way no one can see the post except you, Then you get home. Copy and paste, Delete it. Then add photos to your liking and post.
This method helps me write Steemit posts from the parking lot at my work Because it can be difficult to get a parking spot during the winter.
Why Facebook? Because it allows you to quickly get it online where you can access it from anywhere, Dropbox, Evernote, And Emailing it to yourself are great options as well.

Outlines On Paper

I always carry a small notebook with me in case I get ideas for Steemit posts. Usually, I jot down the key points I want to cover in my post. Then When I'm at my computer, I'll type it all up. This helps me stay organized, Also gives me time to think of ideas of what I want to cover in each post. It makes my post writing a lot faster.

Brainstorm!

Sometimes it's hard to keep coming up with steemit ideas day after day. So I do a lot of brain storming, Basically writing down every idea I get no matter how stupid it is. Then once I have the list of Ideas, I can pick through what I want to write about or I can easily come up with new ideas with the crazy list of stuff I have in front of me.

Conclusion

We are all so busy, Writing regular Steemit posts can be easy and doesn't have to be so hard! You can write a ton if you are constantly looking for ways to make it easier to generate ideas.