tedster - 12:11 am on Nov 14, 2011 (gmt 0)

There are at least two different issues here, as I see it. One is how to stop seeing personalized results. Here's Google's Help page on the topic: Turning off search history personalization [google.com]

A second issue is to stop Google collecting the data in the first place. Remembering that Google also owns Doubleclick and Youtube among other properties, this gets pretty complicated pretty fast. Here's one place to begin research: Google Privacy Center [google.com]