Invest some time in writing and reading affirmations.
Start writing journal so you will get to know what are those thoughts which are pulling you back.
Identify those thoughts,replace those thoughts with positive affirmations.
Read some motivational books,watch motivational videos ,visit motivational blogs.
These will help you to stay aligned with your goal.
Start meditation twice a day. Meditation helps you to focus on your goal.
The most important tip:-
Do these things at least for 66 days without a break.
Meditation is the most important factor ,because all these things are just supportive to your inner motivation and you will get inner motivation only when you will connect to your inner self. You will hear that little voice.
Start meditation immediately.
There are many videos available on YouTube to learn meditation.
Read the blog explaining you how to change your bad habits into good !
All the best!