Raising one’s standards for one’s own behavior:

“If someone raises the standards for their own behavior, it means that they impose higher or stricter standards or expectations on themselves. This can relate to various aspects of life, such as morality, professionalism, kindness, reliability, or performance. Essentially, it means that the person strives to act better or to behave in a way they consider improved or desirable. Such elevated standards can arise from personal convictions, the desire for self-improvement, the influence of role models, or social pressure.”