Do it in Greek! That will rise to the top since it is not English!
A kind of joke...
Seriously, G has been up, down and sideways on ways to game the system almost since day one. While content is king (still is), getting eyeballs is getting more difficult simply because there are so many more begging for the eyeballs.
In most cases (my recent sites) a clean, clear, on topic approach has shown good traction. Sites I'm running these days are immediate (social, political, products, not all in one, just those types) and each is good for THE MOMENT. None of them trend forever. Be prepared to keep offering new, unless the legacy info is just THAT DANG GOOD.
No silver bullet. Never has been.