Since desiringGod.org is a reference site for many of you, you may be interested in a way to simplify online searching. Of course, this works for most other sites, too.

If you use Firefox, you can search any site that has a search bar straight from your address bar--no need to go to the site first.

Right click on the search bar of the site you're interested in. Select "Add a Keyword for this Search..."

Then give your search a name and select the keyword you would like to use.

You're done.

Now, if you want to do a search on that site only, enter the keyword you chose and the term you're searching in your address bar.

Instead of getting back results from the whole web, you will only get results from the site you chose.

(HT: A New Mac Tip Every Day)