Music, 100%
I don't understand people who claim not to listen to music, it's everything.
Literally any situation you could ever encounter has a song you can relate to it, if not directly about.
When I'm at my lowest, I can listen to music and help me process my feelings.
If I need motivation, music. It helps make the most menial of things more enjoyable. You can listen to music to incite a mood/feeling, enhance an experience or trigger memories