When it comes to things like the volume it's 5s, or multiples of 5. The only time this changes is with my current tv it has to be on 8, otherwise it's too loud, and 5 is too soft. If someone hits it higher than 8 I have to turn it back down. I don't know if it's volume or what. If I'm in a car where you can physically see what number the volume is on it has to be 5, unless it's the dashes, then it just has to be even.

For things like plates, they just have to be even, 4 of each. When it comes to organization, everything has to be even. Books, they have to be stakes vertically, or if they are horizontally it has to be to the top...they also have to be in alphabetically order.