I tend to write from a completely blank page, then compile a keyword list and see how the 2 fit together. The right keywords are often the ones that it feels most natural to use and it can be little things like plural rather than singular that make the difference.
I keep saying that the main thing with writing for online is dropping that fear of word repetition that every
PR / journalist has - now remember, repetition is good! It's actually quite nice to write in such a straightforward way.
Where I used to work we had a ban on tabloid-ese, copy had to pass what we called the Britney Spears test. Meaning, no "the pop princess said..." or "the American singer blah blah..." - just say what you mean.