The ultimate challenge of self-improvement is learning how to close the gap between information and embodiment. You feel good while learning because you are in an elevated consciousness state, but the rest of your day, you go back to your usual negative thought pattern, self-criticism, shame, etc. The ultimate key to self-improvement is developing the mental discipline of always entertaining positive thoughts all day long, always keeping your frequency high, and making sure you don't tolerate going back to a low frequency state under any circumstances.