Google has automated staying on top of your common searches (be they web, news, or groups) with their new Google Alerts feature. I’ve been using this feature for some time now and find it really helpful. You can set it to run every day, every week, or as Google notices changes.
For instance, set an Alert for links to yoursite.com on the web, or for when someone mentions Nikon D70 in a news article or on the web.
Another great Google feature: currency conversion. Just Google for an amount with a given currency designation “in” another currency designation.
For example, 15.25 USD in GBP, or get a simple conversion rate with USD in GBP. More verbose forms are supported as well, such as currency of India in Chinese money or 22.1 Indian rupees in Japanese money. Some currency signs are supported, such as US$15.24 in Australian money or simply $15.24 in Danish money.
Seen at the Google Blog here.
Search Engines
General
Google of course. Be sure to master the finer points, like OR and site: and so forth.
Yahoo of course. A pared-down version of the interface is at AllTheWeb.
People
Langenberg White Pages provides a coordinated search form that can send searches to white page directories at InfoSpace, Dex, Switchboard, YP, Yahoo, and Verizon.
AnyWho from AT&T will search for people, places, and businesses.
Also, it helps to check sites that list people search resources, such as NetTrace or Pandia.
Deeper public records searching can yield results as well. Good resources of free public records is at SearchSystems.net, Public Record Finder, and Background Network. Another good aggregator of searches is Pretrieve.
News
Yahoo News is a nice portal into the news culled from a slew of sources.
Google News provides searching for news from various sources, though it’s been accused of bias in what it features.