Descriptive page titles help all users find content and understand where they are within a website structure.
The title of the webpage will appear at the top of each search result within a search results listing.
Titles should be short yet descriptive, as search engines tend to limit the length of the title shown in the search results listing.(Nomensa)
For better search engine optimisation results each page should have a unique title that clearly describes the content of the page.
Unique titles help both users and search engines differentiate between pages on your website. Ideally the page title should match the URL of the page by containing the same words.
Make sure the title is unique for each page and contains relevant keywords.
With regards to the title’s structure itself
Page Title → Site Name is vastly preferred to Site Name → Page Title.
about 60 characters is the accepted limit. (nettuts)
Nomensa Article SEO tips
dated: September 2009
By Emily Coward
Links
WebpageSEO tips
Net tuts Search Optimization 101
dated: September 2009
By Siddarth
Links
WebpageSEO 101