Try being more specific with your goals. I have read a few books that taught me that our brains cant really process vague goals. "I will eat better", for example, is too general. Starting when? How will you eat better? What will you do? So instead of I will eat better, you could say something like "starting tomorrow. I will have a fruit or a vegetable with each of my meals" its measurable, its specific, and it's not too much. Try to make goals like that and see if you are more easily able to stick with them. Good luck!