Chrome (Windows/Linux) only: The things we type into Google, and which Google suggests to us, can be the most private information about us. Chrome users now have an easy way to encrypt their searches and suggestions through an extension offered by Google.
Google's SSL Web Search (beta) extension provides the same kind of encrypted searches safe from third parties as you'd get by visiting encrypted.google.com. Installing this extension simply creates a new search engine in Chrome, which you can then set as the default to make all your Google searches secure or change its keyword for a quick encryption toggle. Your searches should be safe from prying eyes, but they're still known to Google, of course.
Google SSL Web Search is a free download for Chrome browsers only. Mac users miss out on this extension at the moment, but Google says they're working on it.
Google SSL Web Search beta (by Google) [Google Chrome extension gallery]