The Title of a page or the title tag should reveal what a page contains in the smallest possible sentence (up to 70 charcaters) It can go up to more than that but the sentence might get truncated.The Title of a page has the maximum impact when said in an interesting way such that; it appeals to the searcher. The searcher should find it attractive enough to click and find out more.

The title should not mislead, it should be honest about the content. For instance, if it talks about boards games but  takes you to a page where there is no mention about board games, it might have your visitor exiting at a very fast rate, never to return again!

It is important that if expectations are made; they are met.

It would also be helpful if the title contains at least one or more key terms associated with your line of business.

A couple of examples of simple yet effective title tags might be : –

If you type in “search engine” in Google; some of the first page results are –

1. Title : Dogpile Web Search
Description: All the best search engines piled into one. All the best search engines piled into one. Web · Images · Video · News · Yellow Pages · White Pages …
www.dogpile.com/

2. Title : Internet Search Engines – Search Engine Guide Blog
If you are looking for any type of search engine you will find it here. All search engines have been categorized by topic. Thousands listed.
www.searchengineguide.com/searchengines.html – Cached – Similar

It really helps to make a few drafts of the title before finalizing the title header of the page. Testing out the right combination of key words and the flow of the title such that it is attractive to your potential visitors, is sometimes quite a challenge. It is indeed an art.