Regular sinus rinsing made a huge difference in getting that under control. I'm also a big fan of the NeilMed squeeze bottles and that's what I've been using for a couple of years now. That said, this year I switched to the Xlear salt/xylitol packets and I like them better. I don't know if there's actual science to the claims that the xylitol inhibits bacterial adhesion or any of that, but I do find them gentler on my sinuses and less unpleasant if some of the solution works its way into my throat.
I don't rinse daily, but the instant I start to feel even a bit crap, I'll pull out my rinse bottle, distilled water, and packets, and have at it.
I'll be honest, the other thing that's helped is that "world events" normalized wearing masks in indoor public places, and I will continue to for a good while (the 3M Aura foldable N95 masks are _fantastic_) for things like grocery shopping. Wearing them doesn't bother me personally and definitely beats spending two weeks with my head full of crud I can't quite get rid of, or with my ears full of fluid.