EMF Detector to determine variations in electro magnetic fields. (be wary of electrical devices that can cause disruption in the EMF

NVGs / NVE _ Night Vision Goggles / Night Vision Equipment

A digital thermal scanner. AKA a kick ass, precise, enhanced, often expensive, glorified thermometer

Motion sensors

An ion detector

A watch, preferably with its own backlit light source

Cameras, digital, Polaroid, 35mm, video work well

Film, take lots of it ( 400 speed is my choice, but find out what works best for you

Thermometer, to isolate temperature drops and cold spots

Tape recorder, for Electronic Voice Phenomena EVP.

Newly packaged audio tapes

One to two flashlights. I use a AAA mini Mag Lite as a back up.

I bring a Leatherman Muti-tool with me. You never know when you might need it.

A compass, try one with a glow in the dark needle and markings.

Notebook and pen {you can pick up a light emitting pen for about 8 to 10 dollars at most office supply stores.} to record details like temp, wheather conditions, description of occurrences & events.

Identification, A state issued ID and business cards if you have them.

Never go alone to a site, if you do you can risk a Darwin Award.

Dont smoke at the site.

Dont use drugs or alcohol.

Get permission to investigate private property. Respect it while you are there.

Unless you have a neck strap that you intend to wear at all times, remove the camera strap.

Dont take photographs during adverse weather conditions. Rain, fog, snow etc.

Clean your camera lens and make sure the lens remains free of debris.

Dont take photographs of the sun, the shinny thing in the sky, or point your camera directly at a light source. This will reduce the potential for lens flare.

Document what visible light sources are present during the times you are taking photos.