Circuit Boards
For permanent prototypes, I need to make circuit boards.
Perfboards
Pretty simple, but can be logistically complex for larger projects
Copper Clad Boards
Slightly cheaper and can handle more complex circuits. But I have to hand drill the holes and print the circuits. For now, I need to rig up a basic drill press, eventually I need a real one.
For any technique, double check all connections. It's easy for traces to be connected that should not be.
Laser Printing
Laser toner is resistant to ferric chloride.
Requires a laser printer. Saw one cool video were a guy just put the whole board in the printer, when I get a printer, I should try to find one I can do that with.