Welcome to the Q&A Forum

Hey Leon,

Just being honest with you 85-90% of the stuff you read on forums is crap.  Don't pay attention to any of that junk promising you the next best thing.  No building 5000 wiki's forums, spinning articles, scrapebox blast, xrummer, SEOnukeX, ect.  Might have worked in the past for awhile, but since then Google has made updates and pretty much deemed that a waste of time.

Here is some stuff to help get started:

Submit to top directories.

Use http://myblogguest.com/ to find good authority sites in your niche.  Actually answer your post and be on the lookout for more authority sites from people that comment.  Ask, people to retweet and share you content after doing a guest post.

Build relationships and focus on doing that.  Your time will be much better spent that way.

It is probably unlikely that because you are using Twitter that your rankings are falling in Google.  Focus on getting retweets from authority sites in your niche rather than using some bot that has automated tweets every 2-3 min.  Also, the real readers and followers of authority sites could retweet and building links to your site.  Don't use those automated Twitter tools.  They are a waste of money.

I think they matter but not as much as they did in the past

I would write a couple articles on authority article directories, web 2.0's, guest post and spin your anchors on every single one.  Ask connections in your niche to share on social networks too.  It would be more of benefit in the longrun.  ALso, create more pages on your site that are related to your landing page and build links to them as well.  For instance, features of product A with a link to the your landing page.  Don't go overboard with it but it will pay off nicely for you in the longrun.

The whole spinning thing isn't going to do you any good with Google.  I think so much of the time people focus so much of there time on saving time and taking shortcuts that there is no surprise when you sites rankings get dropped because of this.  Personally, I wouldn't use SENukeX and would focus on creating good quality unique content.