Do blog commenting,social bookmarking and article marketing these are the main back-link method that I use...

Article marketing is very effective in my opinion. I often use Article Marketing Robot with a lot of success and have seen very good results with both this and Build My Rank.

Diversity. It's really the best way to go about backlinking. Gimmicky methods, like the link wheel, might work for a short period of time, but Google is constantly correcting its algorithm to detect these things. Having a nice large and diverse link portfolio is the only way to ensure that your backlinks count for as much as possible.

Also make sure to mix up your anchor text. You can get deindexed or penalized otherwise.

Social networking ans shaing links is the best method in my opinion,

Someone was stating recently that back linking won't work anymore ... is this accurate?