There are a few ways to do this, such as muting categories. Here’s another way.
Go to:
https://forum.lunduke.com/filter
and enter a filter! These are the experimental filters from a couple years back. Experimental topics list filter feature - Feature - Discourse Meta
I thought I’d throw in one example, though I’m positive you’re all more than capable of figuring this out and creating your own. If you wanted to filter a sub-category out of your Topics feed, such as retro computing (because who wants to look at that junk, right?) you could do something like this:
-category:no-politics:retro-computing
Note that spaces and special characters in categories should be replaced by a hyphen. If you’re unsure, just click on the category over on the left and look at the name in the URL field up top.
Happy hacking, nerds!