I don't know how others do it, but my main tools are:
* Reading rather than watching/listening.
* Going out of my way to consume content from authors/publications whose worldview I disagree with. Ditto for non-U.S. sources.
* Filter based on seriousness rather than passion. The whole information ecosystem is full of people and institutions ready to be passionate about almost any topic; the number willing to be serious is a lot smaller. This, more than any other filter, will improve your news-consuming experience.
* Read what the journalists are reading to get their story ideas. That means niche-y Substacks, newsletters and industry websites.
Investigative journalism: There are some nonprofits doing an very good job, like ProPublica. But too often, those newsrooms are political/cultural monocultures. To use the ProPublica example, you're much, much more likely to see stories about evil billionaires and how government should have done something(tm), than investigations about how, say, government is holding people back.
Some of this stems from hiring trends in journalism, which have skewed more and more to hiring coastal, degree-holding (relative) elites compared to the more blue-collar newsrooms of the past. Hire for monoculture, get monoculture results.
But the other part is funding diversity -- left-leaning donors have embraced nonprofit journalism in a way right-leaning donors have not.
When the right gives to journalistic efforts it tends to take the form of local investigation (and there are some GREAT reporters doing local-market work with that model), open-the-books efforts aimed at government transparency or, these days, own-the-libs clickbait. This reflects the growing delta between how much the right and left trust the press in the U.S.