First of all, you want to be a writer? Need to do two things. Read and write. Writers WRITE. They also read--other powerful writing, other perspectives, other techniques and craft.
When I write, I tend to write to a single reader. I don't mean necessarily make allusions ONLY this single person would understand, or something like that. I mean, I imagine my reader as a single person, with a pretty clearly defined set of characteristics and a history he/she brings to reading.
Naturally, I need to know this person pretty well.
I am very lucky to have such a person.
I'm reminded when I read this person's writing how good he/she is (I'm being purposefully vague, here, so as not to embarrass this person) at the craft. Not just small-scale stuff, like dialogue and voice, but larger, structural matters, like serendipity and incident.
And I am so lucky that this person reads my writing. That's a rather fundamental necessity in a writing partner, I think. Someone who will WILLINGLY read your stuff. Sounds self-evident, but I have had writing "partners" before who balked at the reciprocal nature of reading/writing.
This person does not.
So, a very genuine thank you to my writing partner. You know who you are.
--Be seeing you!