PPC advertising theory

I have a few PPC advertising theories and wanted to have some opinions. Here;
1- Buy PPC from Adwords on cheap keywords to target a landing page containing high paying keywords so that you would earn more than you spend.
2- Buy PPC image ads to get as little clicks as possible so that you don’t have to pay much while you are making a name for your site.
3- Buy PPC from another cheap ad network to target an adsense landing page containing high paying keywords.
Do you think any of these methods would work or tried something similar?

See original post by maxerg