When striving to reach our goals we often have an all or nothing mentality. If yesterday was not perfect, we can tend to perseverate on that imperfection, forgetting that today is a new day to make improvements.
Improvement is not usually all or nothing, rather small baby steps that move us little by little in the direction of our goals. What one thing can you change about today, that will move you in the direction of your goals? Little by little, make a change.