not preparing is preparing to fail..
Have all your gear in order, and have a plan on how you are going to land your next halibut. Hopefully you take it as a learning experience. Now you know what not to do next time.
We all lose fish from time to time I know I have...sometimes you can do everything right and still end up losing the fish...and sometimes you can do everything wrong and still come away with it...so don't be too hard on yourself as long as you learn from the experience you come away a better fisherman.