Browsing privately

Chrome has 'Incognito' mode in it's options. Very handy when booking flights etc so that the websites you've been looking through don't up the prices on you.
Also handy for reading the IT since last week!
 
File - New Private Window - Ctrl shift P. It basically doesn't cache anything and keeps your history clear in case someone decides to check what you've been browsing over the last few years.