I've used threaded sockets used in table lamps and porcelain sockets screwed in. I've used water heater thermostats, wafer, and digital (incubator warehouse $50 ones are nice). I've used 12 volt computer fans and 120volt cooling fans from radio shack. Besides that, some electrical wire (lampcord or romex, I prefer three wire), a plug and wire (old outdoor extension cord works well), and if you want it safe and neat, an electrical box and cover (I use 4 inch metal) a ground fault circuit breaker , the things to put writes into an electrical box, some silicone, sheets of plexiglass for the windows, assorted screws, a drill and assorted bits, a jigsaw, screwdrivers, probably a knife and wire stripers.
I'm sure I forgot something.