Knowing yourself is the beginning of all wisdom. Begin to master Self-Awareness. First step for practicing self-awareness is gaining a greater awareness of your emotions. The second step is making a habit of tracking your feelings. Fettle can assist.
Some similar apps try to do too much and thus end up being one of the apps I never open. Fettle does exactly what I needed and makes it extremely easy to manage my habits to get the best out of my days