I am one of the most disorganized people you will ever meet one trick I have now adopted is everything in plain sight and labeled nothing will kill the creative process more than “crap where is that part/tool” I use those old school plastic part boxes mainly because you can hang them on peg board.
Top is great for keep assembled or semi assembled projects in and the storage boxes work well for modules etc. They make tackle boxes which would also work great. Handy for haul stuff around, but when I fly I keep the gadgeteer stuff in the my check in luggage as I don’t want to play 50 questions at security and I know the TSA/DHS/etc are going to search my luggage anyways so I’m happy to let them figure out what it is on their own.
Oh if Purple and Lime, were the only colors I have these in, as the wife especially likes to razz me about the Purple and Pink one, but then again she didn’t read the profiling criteria list used by Zombies as they would never suspect a Purple and Pink case as containing weapons of mass Zombie destruction (not to mention TSA agents).