Figured this would be a great place to share all those little ideas people do that don't really fit anywhere else.
Here is one to start off with.
Its pretty easy to add rear 12v outlets that run off the house battery. This is especially important to the 1993 vans that did not come with the three 12v outlets in the back that the 1999-2003 vans did.
Here is an example of a 12v outlet off the house battery that replaces the rear ash tray. This puts it right next to the table and receded for safety. Also puts it above the bed unlike the stock ones. Which is nice for charging a phone at night.