First tip is the easy one: there's a whole bunch of pages dedicated to exam prep - go through them carefully!
2: the test has a few questions that go into the nitty-gritty configurations of some tools. You can look them up, but you'll waste valuable time doing that, so you need to dive into the tools' features for those that are very configurable. Sure, you can do anything in Alteryx given enough time, but this exam is testing your expertise, so you've got to know your stuff.
3: search the weekly challenges in the Community for those that use tools you're not very familiar with. I kept getting Transpose and Cross Tab mixed up, for example, so using them in different cases was helpful.
4: keep a visible timer at your desk - I actually set mine to 1.5 minutes and took the time to reset it after each question (not including the 3 pointers) so I could keep on track time-wise. It would have been too easy for me to get drawn into a problem and waste time otherwise.
5: make sure you've got a place you can work without interruption for 2 straight hours - my son wandered in with an "urgent" question when I was in the last 25 seconds - what a stressful moment that was!!
