I like the advice that I heard in a writing workshop: "Write what you know that others don't." Plus, analyze what kind of writing you really, really want to do. What do you yourself like to read? This site lends itself to more factual, journalistic, how-to writing (although writers here like BillyBuc and WillStarr have been able to work around that focus with wonderful short stories and poetry).
There's a special name for writing that works on the web, but I forgot it. Let's call it "list writing". (If anyone has that term, please comment). List article seem to work: 5 Ways to Fix a Carburator; 7 Ways to Enhance Your Relationship; 99 Kinds of Candy Bars (There actually was a song in the 50s that had that line).
Anyway here's a quote from 7 Things You Need to Know About Writing Lists":
"Simply put, lists work because they conform to the idea of “Left-Brain Marketing”. Everyone has two sides of the brain, and each part controls a specific way of thinking. The left brain is analytical, and prefers a step-by-step approach (i.e. lists) while the right brain prefers to see the big picture first and then deal with the details later."
I, myself HATE writing the "List article" since I'm very right- brained. I think that's why I don't write here often. However, as I said there are prolific writers here who have great following who have worked around that paradigm. Best wishes: Cheers, Billie