Before any entry, I use burning sage and let the smoke linger around me. Native American believe sage protects them from evil spirits. While doing so, I'm catholic so I say my prayer. I think good luck charms always help to make you feel a little better.
If you plan to go on an investigation, be sure you bring a :
1- LED flashlight which can easily last 48 hours non-stop before battery goes low. Mine has a Red and Blue lens to help not attract a lot of attention. Also to be considerate to the people leaving around that area. No need for light pollution.
2- Bring a digital voice recorder for EVP
3- EMF meter if you got one.
4- Walkie Talkies for needed communication.
5- Digital camera & Video Recorder with night vision helps.
6- Take a journel or records. This helps so you can draw out maps, and pinpoint precise location for the next investigation, or for future reference.
7- Bring a GPS locator or compass. GPS is better because you can use it to head in the right direction, prevents you from getting lost ( in the deep woods ) and you can use it to save key points of interests.
8- Bring a battery, operated black light. I have heard this is the most intense light that help apparitions manifest. They draw energy from this to help make themselves more visible to the human eye.
http://www.gettysburgghosts.net/do.htm