Like most people, I don't like to be tracked more than I need to be. I believe in privacy policies that do the minimum collection needed as opposed to the maximum collection possible. I am also the founder of the search engine that doesn't track you, DuckDuckGo. For these reasons, I personally don't use Google services where I don't absolutely have to, and honestly it's not very hard to do because there are good alternatives. I get asked a lot what I use instead of Google services, and this post answers that question.
Practically, switching away from as many Google services as possible will help alleviate the most obvious issue of the bulk of your personal data being in the hands of one company since Google already passively collects click/browsing history through Google Analytics and their ad networks embedded across the Internet. It will also alleviate some non-obvious issues like ads following you around the Internet and getting trapped in your personal filter bubble.