What can be done nowadays that is more useful than harmful:
1) Comments on keyword-related blogs?
2) Link exchange campaign?
3) Posts in keyword-related forums with a signature link?
4) Create articles and submit them to articles sites / blogs?
5) Create a Facebook & Twitter account for each site I want to promote and invent subjects to write about?
6) Something else?
7) Nothing; it is dangerous to do an intensive SEO campaign in 2-3 weeks.