No real set procedure, just build links normally. Stay away from automated link building.

The idea of natural link building is other people do the link building for you, ie.. leave your link in a forum, post it on yahoo answers, link to your article from their website etc.

You can post to article directories, guest posting, relevant blog commenting etc.

Yes there is.

Write very high quality articles and hope other webmasters link to you without you having to prompt them

Yes if you making links with constant velocity and mix type( all PR, nofollow, dofollow, by article,blog, smo,one way, 2 way etc,) then they will look natual.

Unnatural link building will never ever help to please Google.

The trick to please Google- Your links should not appear natural it should be natural!

100% natural I do not get it, this particular has been in constant discussions since long and answer is very obvious.

People may spam and fool search engine but will not work for long!

From last 2 year or so, i am using the concept- Natural link building, and also believe creating quality content for promoting.

Use pictures and videos.

@cisin are forum signature links natural? Especially 2 of them..

Just get links from quality website, that makes you look natural and gives you credibility. Still more better try to get backlinks from the sites only related to your niche.

Don't use any automated software to build links
show variations in your anchor text when you build links(Don't use same keywords)

Create links in slow pace by varying the anchor text, dofollow/nofollow types and from different sites like forums, blogs, articles, hubpages etc. Also sometimes skip a day or two while building links (e.g. on weekends and so).

Yes, it consist of mixing a bunch of tools in a certain way. There's tons of ways, just most people and big time SEO peeps don't discuss them.

There is only one procedure just build backlinks with no spamming at all.It looks natural then because its obviously natural process to build links.

Manually linking is the natural linking process, but it is some hard and takes some more time. You may contact to all persons who are ready to exchange linking with their websites.

Ignore the areas where you found more spam and try to make links where there is no spam