The dance is basically over at this point, though some deep crawling may still be in progress.
Links are often dropped due to relevency issues, page rank, duplication and penalization.
If you exchange links with sites using link farms, excessive links per page or ones that are penalized by Google you run the risk of being penalized also.
If you are caught cloaking you will be permanently banned from Google. This often happens after several months, but eventually it does happen.
If you are targeting competitive keywords like online casinos a cloaked site will be banned very quickly as your competitors will report you to Google. That domain will be banned and all sites linked to it penalized.
There are no shortcuts or magic bullets here.
Build a quality site with good content. Exchange links with other quality sites, update your content regularly and in time your rankings will improve.