A playlist with room to breathe
Choose a setting first: cooking dinner, taking a train, or sitting by the window. Begin with three songs that suit it, then build outward.
Use contrast gently
A playlist does not need every track to sound alike. Try a change of instrumentation or an older recording between newer ones, and listen to how the transition feels.
Keep the first version short enough to hear in one sitting. Remove the tracks you keep skipping, and save discoveries for another day.