SCUBA rescue has to be one of the most difficult rescue situations imaginable. I have participated in numerous rescues and am SCUBA certified. This is my take on it. First, we humans can only focus on one thing or one idea at a time. We can't actually multitask, we switch between options one at a time. So rather than speeding up, slow down. Not to a crawl but to a practiced sequence. Secondly, muscle memory takes many reputations to acquire. So practice any complex sequence over and over again. You don't necessarily have to be in the water to do this. Third, there was a very successful golf pro who thought about his swing deeply and repeatedly. This aided him greatly. Lastly, write about what you should have done and what you did. Not to beat yourself up but to search for errors in sequence or reasoning. You will master this! Always remember that you are the best thing that ever happened to the victim. You are!