Mental Success
There are 3 elements that will ensure success in weight loss.  They are motivation, consistency, and discipline.  They form the success triangle.

Motivation requires finding the deep reason that you are beginning this journey.  It must be a reason that will keep you on your program even if you do not lose any weight.  Finding that motivation is the key to permanent weight loss.

Once you know your true motivation the other 2 elements of discipline and consistency complete the triangle that will ensure success.
The Success Triangle
L.I.T.E.
Lifestyle Improvements That Empower