My favourite way of finding new tech stuff, hardware and software, is via YouTube.
I watch a fair amount of YouTube content, from low-end and more heavy stuff (from Linus clickbait LTT, to GamersNexus, to L1 Techs). If one of the big guys does a review, I'll probably watch it, even if it's not something I'm generally interested in. Because I like the style and they make stuff engaging, I'll enjoy watching it.
I could probably recite GlassWire, Nord VPN, and PIA's specific marketing points from memory at this point, because of the sponsorship of YouTubers I'm subscribed to.
I'm starting to watch more Twitch and YouTube livestreams too, mostly Overwatch-related content but sometimes branching out. (Live Cosplay Twitch streamers are fun to watch!) I've watched a couple of tech livestreams, Charles Lohr especially.
As for other avenues, Google, Hacker News and Reddit (PCMR and Sysadmin), Facebook and sometimes even Instagram...
I Google pretty much every problem I come across, even if I already know the fix, so that's a big source of finding out about new stuff. Pretty sure that's how I found out about Fences back in the day.
I'll binge Ars every month or so. El Reg a couple of times a week.
Rarely via Google Ads, when I Google for a specific problem, but I'm usually blocking adverts by default.
"Alternative.to" is something I check semi-regularly, especially if I know of a product that solves a similar problem to the one I'm trying to solve.
I'll usually read related Wikipedia pages and check for links and pages for other software for products and/or problems.
If something's on Ninite then it's vastly more likely to get added to my standard install pack.
I've bought Humble Bundles, which I guess counts too.
I hope some of that's maybe helpful!
I'm looking forward The Video Game machine. I've already got a couple of ideas for games I want to try and make!