The most important thing is to give yourself the best chance to succeed that you can. If you put in the work, you get the results. To get the most out of hypnotherapy you need to do the tasks that have been set by your hypnotherapist for when you're not in a session. Progress always requires willingness and curiosity. If you're willing and you're curious to find out how you can do things differently and better, then you will find yourself making great strides ahead. If you treat hypnotherapy like watching television you'll get about the same result you get from watching television.
To get the most out of hypnotherapy come to a session with a willingness to find out what you don't know that if you did know would make a difference to you life. And then leave each session and spend the time between the sessions finding out how what you discovered you can do differently is working.