How do I push myself to keep a mindset for weightloss

Lillian, it is good that you know your problem at hand, 'Not meeting up your plans.' Only by knowing this, is the starting point of your problem solved. 

First, you need to develop a reminding sign, this could be: nodding your head, raising your hand, stamping your foot or thumbs up. Once you realize that you are sabotaging yourself or giving excuses, just use your sign 'nodding your head,' this will automatically remind you that you are sabotaging or giving unnecessary excuses, then there, get on doing the important thing or planned activity for the time. That conscience you have that tells you to say,' I need ways to push past it' is the adult or parent part of yourself, this is the part in you that has all the best advice to teach and encourage you do the right things. So you can use the sign together with this conscience to overcome your habit of giving excuses and sabotaging your plans, you will always get and do the best for your life. 

The use of what I called conscience is in other words called, 'Self-talk,' Every person has 3 aspects within them, Adult, Parent, and Child which develops as we grow up. We experience them as our self talk, the thoughts, that we engage in, and we experience them through the job they perform.

1. Adult: The adult is our reasoning part, which gathers information, enables us to manage our life, to make realistic assessments and to be assertive. To do this, it needs sound information available.
2. Parent: When working well, the parent is our teaching part. Modeled on our experiences of our parents or care givers. It monitors our actions, protecting us from harm, teaches us about life and acknowledge our efforts without criticism or judging.
3. Child: The child's job is to be spontaneous, curious, creative and fun. Enables us to experiment, innovate and play.

Together these three parts are intended to function as a balanced team, meeting the challenges of life. However, if the person experienced traumatic events or inadaquate parenting in their childhood, the inner messages or thoughts will be damaged, preventing the team from functioning correctly. 

- The good news is that this comes as a result of learning the behaviour from others, the person can learn again the different way to correct the damage caused, and this is where counselling will be the best thing to engage in.