*Check out the area in daylight so you are familiar with the area.   Look for dangerous places and obstacles that you will not be able to see in the dark.
 

*Look for no trespassing signs.  Make sure you are not trespassing.  If you are on private property you are risking getting a ticket or arrested in some areas.  You can get permission from many owners and or caretakers.   We will often notify the local Police that we will be in a grave yard "taking pictures" so they are aware of our presence.  If you are asked to leave do so immediately, you will not win this argument and you make other investigators look bad if you make a scene.
 

*Make sure you bring you ID. (Drivers license, etc.) so if you are questioned by the police you can prove who you are.
 

*Never go alone.  This is just common sense.  If you get hurt, who will get help?
 

*The best times are from 9pm to 6am, these are the psychic hours, but anytime can produce results.  Photos have historically been better in the dark but don't let that discourage you from taking them during the day. 
 

*Find out all you can about the history of the locale.  Newspapers, town historians, WWW and books can be helpful finding folklore or hard facts about the site.

*If it is raining, snowing or foggy and you are scheduled to do an outdoor ghost hunt, reschedule it.  You cannot conduct a proper investigation in these conditions. 

* Keep an open mind, any negative feelings may drive the spirits away.  Be respectful of the locations and the dead. 

* Be skeptical, look for causes for any phenomenon such as natural or manmade causes.  As an investigator you have to make sure your final evidence will stand up to scrutiny.  By eliminating all other explanations, your evidence becomes stronger proof. 


* No smoking, alcohol or drugs at an investigation for mostly obvious reasons. 


* No whispering, it can taint your recording results. 


* The Tax Assessors Office can give you historical info on many locations you visit. 


* Do not wear perfume, cologne or anything else with a very noticeable scent.  This is so someone does not mistake the smell for a supernatural occurrence.  Spirits often use scents and smells to get our attention.  


* Make sure you let someone know where you will be so they will know in case of emergency. 
 

 

Source: http://ghosthunting101.com/