During certain routines, it can be difficult to build the routine because of the amount of sensory input being provided by the activity and environment. So having a Focus Board help remind you of the steps expected of you during the routine can help a student focus on the task at hand.
You can post it next to the toilet, song lyrics for those who are reading or know the song, counting for those who are working on counting.
One minute should be plenty if you are still working on potty training.
Edit: I added poster versions after receiving feedback on cleanliness