Face it! It's a disaster! And the longer you are in this hobby, the worse it gets.
When you complete this project, your cabinet will be neat and tidy and you will be able to easily find all of the "stuff" that you frequently use to maintain your aquarium as well as access your timers/power strips without having to move and dig through all of the "stuff".
Below is a photo of the "stuff" under our 92g Bow Front tank after just 3 months before we organized it.