dont use automatique link building to your tier1 backlinks.**
build (6-10) links on heigh PR websites everyday (tier1 links)
and build links to your (tier1 links) you can use automatique link building like senuke

Writing a blog comment is a great way to advertise your cause or organization by featuring web addresses that venture back to a specific site or blog. Blog comments are a reaction to a blog post, so it should be your opinion to what you’ve read. Think that it will be reasonable to recommend paidforumposting.com team of writers - pricing is normal.

Free directory submissions are not useful at all. They don't provide with a dofollow link and also they won't bring good amount of traffic.

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Spamming... even they make a results if used as it should be

EDIT: even blog commenting and bookmarks give results... but not direct. They are more for link diversification, and natural look