Very hard. Because,Google is revolutionary. It started with a website of search, and it turned into one of the most powerful enterprises in world. Android, Youtube and other things in our day....It's Google! I mean how we can live with internet,but, without knowing the links that we are looking for? And yes, we have Yahoo! and another searching sites. But, What about Nokia, LG, Samsung and their Smartphones? nokia will continue with her Symbian? And Samsung with the Bada? Ok they can adopt the Windows Phone, but I think Windows Phone sucks! Android is the best. And YouTube? The most visited site for video sharing? Google maps and the revolutionary Street View and the "Museum View"? Google Sketch Up? Gmail(This really sucks....)?
If Google doesn't exists, never of this will be never created. Now, make the test and don't use NOTHING that has a relation with google for a month. Don't use Android smartphones, don't use Google Maps, the web site of Google.... And tell your experience here....