At theMediaFlow we pride ourselves on being insanely detailed technical SEOs. We use a foundation checklist which is adapted from client to client and sector to sector; though in general we always tend to include the items explained here.
9. Complete additional checks on site integrity
Canonisation Does the site use the canonical tag? Check across www and non-www
Check Site Speed
Review all
outbound links
Check G.A Crawl Errors and Stats
Remove all junk from Source code
11. Check for all forms of duplicate content
Check for dupe titles & headings Use Copyscape to identify any dupe domains/scraped content. Utilise Pagination on site for related pages.