Originally Posted by surreypcsupport

Contributing factors for SERPs for any given keyword are:

Keywords in domain;
Keywords in page title;
keywords in page file name;
keywords in <h1> tags;
keywords in "alt"
keywords in internal link anchor text;
keywords in backlink anchor text;
keywords in image file names;
CTR from SERPs
content technical quality i.e. W3C compliance;
page load times;
domain age;
quantity of backlinks to site/pages;
quality of domains in which backlinks sit;
age of backlinks;
topical proximity of domains in which backlinks sit;
topical proximity of any domains which appear in outgoing links.

That's all I can think of for now.

Kudos surreypcsupport. Guys... This is a checklist everyone should use to optimize their webpage. You can't go wrong with it..