What do you read?
Whenever I go into the Barnes and Noble,  I go into two sections: science fiction and the reference sections. 
The science fiction section tells me where the trends are and what types stories are popular,  etc. I want to be unique,  therefore I have to know what the big 6 are putting out. Also,  I read the genre in order to improve my writing skills.
The reference section has received a lot of my money recently. I have a small library on editing,  characters,  plots,  themes,  etc. These books have exercises that has really helped me.
What do you write?
I write science fiction novels. Usually dystopian,  space operas,  and cyberpunk. However,  my stories focus on he characters first,  science last. I make an effort to have three dimensional characters. My character arcs always include an internal change,  at some level.