I’m not paranoid on the web (yet), but if I were I’m happy to know there’s a place to go. DuckDuckGo, the anonymous web browser, has an illustrated guide called Google tracks you. We don’t that explains their philosophy of the web.
DuckDuckGo has also published a guide to Escape your search engine Filter Bubble! which is helpful to understanding how your search history eventually filters web results to fit your world view.
If you’re curious to know what Google knows about you, you can view your Google web history.