Article network for me 100%. I also dont interlink my sites I own.

Article site...
I love to post article for getting backlinks and find it more beneficial

Thanks guys! Do you spin and automate, or manually to a select few?

Profile Links, The Link Juicer, UAW and Best Spinner. That's it!

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Guest blogging can be a great way to increase one's PR, if the blogs are high-PR themselves. You can buy services to increase your PR, as well.

Buy them

Forum Posting, Blogging and Article syndication are the best ways to get quality back links.

i think directory submission is the best proess to increase backlinks

If I had to recommend one tool/method for getting quality backlinks, I'd have to say use BMR. Yes it will cost you some money, but if you do it right you will make that money back easily by getting great Google page one rankings.

The quality of links you get from them are great, and more importantly they all get indexed which means they actually count.

Definitely give them a try if you can afford the monthly fees.

Do you blog commenters worry about no-follows?

Linkbaiting on my blog and guest posting on vertical niches

I use the below to create backlinks:

1. Home Page links from high PR sites
2. Private log post submission (Example: BMR)
3. Social Bookmarking
4. Blog comments from high PR pages

Profile links used to work well but not now. If you do more profile links, you will end up hurting your site very badly.

Best way is to diversify the source of backlinks, do not depend only on one method.