What makes you feel you're not doing enough? Apart from just about everything really.
Not enough exercise, eating the right food, keeping a clean and clutter-free home, zapping through your to-do list, keeping up with the news, friends and exploring new hobbies and all that other unnecessary stuff that distracts us daily.
Sometimes our lives can feel incomplete, like there's something missing or that we've overlooked; some nebulous important thing if only we knew what. A sense that enough is not enough or an unacknowledged craving for wholeness.
We can conceal this feeling with busyness, shopping, drinking, gambling or using social media but ultimately find that it's just papering over the sensation of “what else?” Like eating a wafer when your hunger is ravenous.