I only have one console hooked up at a time. Rest are in a cupboard. Currently snes is out and I'm trying to get 96 stars on super Mario world whenever I can snatch a few minutes. I've got an everdrive for all consoles I care about: SNES, nes, mega drive, N64.
I think best thing to do is pretend I've only got one game and play the shit out of it. Basically emulating being a kid with no money!
If I'm really honest though, very few old games really keep me interested these days. Nintendo as always is the exception. Super Mario world is basically perfect. 95 percent of most consoles library's arent worth the effort of playing (in my unimportant opinion!)