When you GM how do you keep track of conditions and other ongoing effects?

I play about 75% of my games on Foundry and let the automation track them for me.

When I GM in person I really like to use the path builder 2e encounter builder, it works amazingly well

https://pathbuilder2e.com/encounters.html

The Castle Ravenloft boardgame comes with a few "wound" markers. Which are cardboard tokens that have a 1, and a semi-circular cutout at the bottom that let's it easily sit next to miniature bases. I use these as reminders for any status effect going on for a creature, and stack them for effects that count down every turn.