I always keep a printed copy of my test in my pocket just in case I need a quick read and catch up. I’d rather have it in my pocket than with a helper because they will often be away from you at the other end of the warm up or most likely forgotten to bring it with them.
I put the folded up copy in my pocket the evening before normally and it has saved my skin, the most recent example being at a pure dressage event when about 60 seconds before I was due to go in I realised I had learnt the wrong test first. As I had both tests in my pocket I was able to get the correct one out in seconds and remember where I should be going.
I do this, or take a photo of the test on my phone (decent size screen luckily) so i don’t lose all the bits of paper!