The main thing is to keep the obligations in one place, wherever that place is. You get in trouble if you have an app, an electronic notepad, a steno pad, a teeny tiny notebook, and a journal. But thoughts! Thoughts - that's something else. Keep your thoughts somewhere safe so you can find them later. I don't know about you millenials, but writing things out tends to lighten that psychic weight for many people.What's the best way people keep track of their thoughts and obligations?
A steno pad. 
This really resonates with me. I have too many disparate places for stuff. Like three apps and a physical pad. The physical pad is for redundancy because I don't trust my system and can't relax unless everything is in one place in front of me. Thanks Lil, I'll start condensing.