Logseq is a great opensource tool for that

It's more than that for me. Has Richard Feynman says:

I can not work if I don't start a work journal

Works for me too. As I work, I constantly write down what I'm doing in my vimwiki. Like a simplified version of the Obsidian tool.

Going back to those notes now, as I finished lunch and want to pick up where I left off.

All journaling for me happens in my physical moleskin journal!

I think my problem isn’t so much about forgetting what I need to do. My challenge is to ease into flow state as soon as possible. I find that sometimes it takes a long time for my engine to get started even though I plonk myself in front of my laptop n no disruptions