Writing Practice 37: Thirty-Seven?! - Clerks

I get it.
You're training yourself to be a writer.
That goes beyond the computer.
You're not a writer when you sit down on the computer and write.
You're a writer when you're walking around, talking to people and going places.
If a computer is busy, you SHOULD be inspired to grab a pen and paper to write down good ideas.
If you're training yourself to be so inspired that you're constantly conceiving good ideas, you need to be ready to put them down on paper, wherever you are, and work with them later.
Be ready.
Carry a pen and a pad of paper.
Or, carry a laptop.
Hell, carry a typewriter in an awkward case if you have to.
But be ready to record the spoils of what you're trying to inspire

"Shit, someone's on the computer. I guess I can't do some writing."

Excuses, excuses, excuses.
If your writing inspiration comes down to needing to be sitting at a computer, you've limited yourself in a horrific way. Being a writer is not about having access to a computer.
Being a writer is about writing.

And, if you're prepared, you can write anywhere.
Be prepared to write when you want/need to.