I use "Ad Blocker Ultimate" in my Firefox browser so I rarely see ads online. The few that sneak by are easy to ignore.
I use an old program called RadioSure to stream radio stations on my computer. The vast majority do not have commercials. I usually listen to country music, but there are stations for every genre.
I record over-the-air TV broadcasts on my computer, then use a program called Comskip to remove the commercials from the recordings. It took some effort to get it all set up and automated, but I haven't seen a TV commercial in years except when I'm watching the nightly news live.
I use a program called 4K Video Downloader to download my favorite YouTube videos. This avoids the advertisements and lets me watch the videos at my convenience on my TV. I don't even open my web browser, I just copy the link from the email notifications.
I watch movies and some TV shows on Netflix without commercials.
All of my bills are autopay with electronic statements. So I get very little mail in our mailbox. You can reduce most of the remaining junk mail by signing up at:
https://www.directmail.com/mail_preference/
You can also contact most catalog mailers and ask to be removed from their mailing lists.
The Do Not Call list will stop most junk phone calls:
https://donotcall.gov/
It's impossible to completely eliminate advertisements (they're on buses, billboards, roadside stands, in magazines and newspapers, etc.) but the above steps lets me avoid the vast majority.