OK, here are my secrets:
Calibrated light meter
Calibrated TDS meter
Calibrated pH Meter
spray bottles (lots of those)
Home Depot 5-gallon buckets
2 RO units
Nikon D200 camera with lots (more than 15) lenses
Photo studio
A whole library of orchid books (some pretty expensive and pretty specialized - like a whole volume on Angraecoides)
Orchidwiz software
a Turkey Baster (I'll let you figure out what that's for
)
A calendar (for keeping track of the water/fertilizer regimen)
Fans - lots of them - for circulating air
Drip trays
Small clippers to clip off stuff
Wire stakes to stake up stuff
Sponges to mop up stuff
and even a "Sham-Wow" for soaking up drippage and moisture in the fans of Phals and Paphs.