[agripas90]

i preffer getting links from blogs but not by comment but by asking for 3 way link excahnges in this way you can get quality links

[aishaarora]

both are important in seo.......A blog is short for Web log and is more of an online-diary than anything else.
A forum (or Board, more properly) is a full-blown discussion system, with users, permissions, fora, etc

[angelinasharma]

I do first blogs than forums.