It can be complicated to remove all traces of your online activity but if that's the goal, start with the basics and remove all cookies and clean the cache of your browser with a free tool like C Cleaner.
Once it's installed and up and running, it's simple to check the boxes for the items you like banished from your browsing history.
To prevent your browser from even keeping track of things like page history and passwords, enable the private browsing feature found in most browsers.
That's what it's called on Firefox but on Google's Chrome it's called Incognito and at Internet Explorer, it's in private browsing.
While this feature makes a point to knot for any information from any site visited, your computer's IP address will still be recorded as visiting that site.
So really, this stuff gets you half way there to being totally private.
To take your privacy to the next level, you'll need completely anonymous browsing that's bound through the whole network.
It's a free download from Mac or Windows computers and is one of the most secure ways of surfing the web in private because of the layers of encryption.
you can also transfer the download to a thumb drive so you can use it on multiple computers even on the go.
In San Francisco, I'm Kara Tsuboi, CNET.com for CBS News