Pick up a copy of the ISC medical UKAT 1250 practice questions, read through all of the advice and tips in there but most importantly just bash out the questions over and over again. I never paid for any online subscription type things to help with mine but if you have the money to do so it can’t hurt, I’ve heard good things about Kaplan. There’s lots of tips on YouTube by lots of different people and companies, which are free of course. The main thing is practice, over and over again. Where I started compared to where I finished was mostly just by quickly reading over tips, remembering things like steps to take in the abstract reasoning and how to approach questions and then just doing them. This will also help you identify your weak areas. In the end I got a fairly respectable score and Band 1, which I’m sure could have been improved with even more practice - especially at abstract reasoning. Good luck with your UKCAT.