Here's what helped me 1) realize that grad school, and the profession at large, promotes a narrow/claustrophobic vision of what it means to be a therapist - i.e. our only job is to improve skills, which is bullshit - subscribe to that and wait to be constantly disappointed.... One can take a much more evidence-based and philosophical approach that draws from multiple domains of study (e.g. psychology, education, bioethics).

2) Read as much as you can and digest and mull over the research/science yourself. You'll never become a confident therapist looking to other people to tell you what to do. Professors, supervisors, and other "experts" are, at best, guides pointing the way at times. But, be advised that many/most of these experts have a minimal amount of direct clinical experience themselves.

3) related to #2, become an expert in the population you treat. Know more about it than anyone else. Until you achieve a certain level of knowledge/mastery, you'll find it difficult to feel creative. After you get to a certain point, what was once stressful becomes a series of interesting challenges...