Which is best SEO trends in 2013?

Apparently a big one is signing up to SEO forums with keyword-laced usernames and signature links, asking random SEO questions you already know the answer to, and overall wasting space on the site as well as peoples' time.

Mostly SEO trends are used in social sites. Facebook, Twitter and Google+ are the best social sites where you can create trends.
hash tag (#) is used for creating trends.

commented: Please explain hash trends! +0

Anyone to expound hash treds in detail please!

just add one more thing Google Authorship although others are same

I am bit confused.. Anyone please explain what is meant by Google Trends..?