You can't win in life if you're losing in your mind as Tony Gaskins used to say.
The habit of celebrating small victories boost your self esteem and reminds you of your value.

Understand why it’s important to value “small” victories.
Since most of the time people focus on things that ARE NOT working or that they DON’T like, they will only attract more of it.
The Universe recognizes your actions and attitude and will send more and MORE SITUATIONS that align with it.
Your reality is a reflection of your thoughts.
“Believe in yourself. You are braver than you think, more talented than you know, and capable of more than you imagine.”― Roy T. Bennett, The Light in the Heart
It is very clear that people tend to focus much more on what ISN’T pleasing them, what they still DON'T HAVE and what HURTS.
You can change this! Things can get much better! It just depends on you.
If you train yourself to get used to celebrating small achievements, you will focus on your wins, and when you focus on the happiness it brings you, you will only attract more and more wins, as you’re connecting with the vibration of success.
Whatever You Put Your Attention on Expands.
Remember that every ACTION is a command given to the Universe.
Try focusing on small achievements and being proud of YOU more FREQUENTLY, thus attracting much more wins and pride to your life.
Consider giving yourself a chance to feel happy more often.
Not only will it make you feel good but it will also get you all fired up and ready to achieve more and maintain a beautiful winning mindset.
New HABITS bring a new reality and achievements.
“What you pay attention to grows. If your attention is attracted to negative situations and emotions, then they will grow in your awareness.”— Deepak Chopra