Never put ads to new sites immediately as Google may mark your site as ad farm and won't index the site. You need to wait for a month or so to start ad activity. It's been seen that Google bestows high ranking to sites having multiple incoming links. The critical fact is that such links must correspond to higher ranking site only.

You won't get any benefit from any sub standard link exchange sites and more over Google will side line your site for link farming. Your inward bound links must have relevance to content of website. You can link web site with good social book marking services like heavenly, dig.com, reddit.com, to name a couple but there are plenty of other such sites which should serve your purpose but the majority of social bookmarking sites use rel="nofollow " attribute which doesn't help accelerating Page rank of website.

Google spots copy contents, copied content etc and never index sites which employ them. It is always recommended to give applicable link and reveal the content source and so on. Always link single page with canonical URL. Always desist from excess use of key words, over improving, unimportant use of key word as this negatively is affecting website's page ranking.

It's been exceedingly commonplace practice to use invisible text and use it at the end of the key page but this isn't a reasonable action to take as modern search engines notice it and may penalize your site. Always try and avoid question characters like "?" As search engines never appreciate dynamic pages with such characters. It is really vital to perform correct redirecting. When moving content from one page to another make certain to include 301 redirect codes, which signals that page has been moved forever.

Google implies that there should be less than a hundred links in a single page. Always put links which are equal or higher page rank sites and must have relevancy to the content of the page. Never use unapproved software or programs to test rankings, submit page as you could be violating service terms for example.