welcome to show a way for newer how to SEO website in 2017?

hey everybody , i already in SEO half years but dont have money from it , just only input ,test, give up !!!! dont have enough parience ,Now i wan to know more methods about SEO push a business trade site the methods already try follow :

1, update articles

2 do some blog comments and forum ,is it spam backlinks by Gooogle ?

3, Social platform , FB, Google +,Teitter , i am not start now , is it also have some effect ?

4, Free webs 2.0, use free blog , not start now is it…

welcome to show a way for newer how to SEO website in 2017?