Phone - Use an iPhone or flip phone.
PC - Use Windows, Linux or Apple systems. Microsoft does a fair bit of tracking so Windows needs to have tracking disabled with something like Spybot Anti-beacon.
Browsers - Avoid Chrome and any other browser based on Chrome. These days that's just about all except Safari or Firefox.
Search engines - Use DuckDuckGo as the default search engine. Disable or remove Google search.
Browser add-ons - Use a cookie blocker to block cookies from Google. Use an add-on such as No-script to block scripts from Google. Use an ad blocker such as uOrigin. Use a privacy suite such as DuckDuckGo Privacy Essentials. Some sites will stop working if these are used. Add exceptions for trusted sites but some Google scripts may need to be allowed.
Privacy apps - Use programs such as CCleaner, MalwareBytes AntiMalware or SuperAntiSpyware and to delete cookies and other tracking artifacts from the PC. Schedule them to run regularly or with events such as closing the browser.
Avoid "smart" TVs, and other smart devices of all types. Avoid any Google services such as Google Home and Gmail. Services and companies such as Twitter, Facebook, Amazon and similar services can be as bad or worse than Google when it comes to tracking privacy.
Last but not least, move to the wilderness and live off the land.