I gave my students an assignment to write a daily diary. After explaining some of the benefits outside of language learning they asked if I wrote one. And I used to, and I loved it and I shouldn't have stopped.
So, write everyday, even if it's only one sentence. That was the assignment.
I'm doing this from mobile and it works well enough, for those days when I'm tired and I just need to write something from bed.
That should do it for day one.