"Fuses are a different story though. I just pull them all out every 5,000 miles, rotate them 180 degrees and stick them back in. This way the electrons flow the opposite direction through the fuses for the next 5,000 miles. This 180-flip makes the fuses last longer,... sort of like flipping your mattress occasionally."
This is the first I have ever heard of this. What empirical evidence do you have to support this?
The only times I have ever needed to replace a fuse is when I have put too much current through it. Period.
You may think you are getting more life out of the fuses because you are reversing the electron flow but in reality when you pull the fuse to turn it around you are cleaning corrosion from the contacts. Corrosion in the contacts causes a higher resistance, requiring more current in the circuit, which can eventually blow the fuse, if there is enough corrosion.
My house has aluminum wiring. As you know, aluminum corrodes instantly when exposed to oxygen. When it was built the builder did not use aluminum compatible outlets or switches. I went through the house sanding all the wire ends with greasy sandpaper, so corrosion couldn't form on them. Saved $20 a month on my hydro bill.
I regularly unplug and plug in the rca and balanced connectors on my stereo system, especially the turntable connections. My cartridge has an output of .23 mv and any corrosion affects that circuit. I do that with all the fuses too.