The best way to know what your competition level is to look at the quality of the
top few sites and their link profiles. Are their sites .edu sites, old well branded sites,
or other highly useful sites? Do they have many editorial links pointing at their
site?
Google primarily relies upon site age and link reputation to determine [...]

My Trial & Error
I was a “hack-and-go” sort of person off the start. I have re-made thousands of
web pages, most of them by inefficient means. Some of my worst mistakes are:
using frames, trying to become an affiliate of over 1,000 websites, free money
scams, and generally creating garbage without learning about the web.
Business & Change
The Internet [...]

Some search engines, such as Google and Yahoo!, have toolbars and systems like
Google Search History and My Yahoo!, which collect information about a user.
Search engines can also look at recent searches, or what the search process was for
similar users, to help determine what concepts a searcher is looking for and what
documents are most relevant for [...]