The Google Blog has announced a new set of tools, called Search Options, which allow you to slice and dice your search results to find what you need faster and easier.
Once you have searched Google and have a list of results, click on Show Options, under the search box. This will open Search Options, where you can limit your results by videos, forums, or review; or limit by date, so that you can see results from the past day, week or year. You can change your view, too, so that so that you can see more or less text or more or fewer images in your results. Search Options also includes Wonder Wheel, which gives you related terms for your search topics.
Watch this video from Google to learn more: