A couple basics can take you a long way on an investigation. When on an investigation it’s important to stamp your digital recording with your name, time, and location in the facility you’re investigating. This will help you later to identify evidence more effectively. Also, don’t whisper. These can sometimes sound like an EVP.
When doing an EVP session, give your spirit time to answer. Keep in mind, the theory is that it takes energy for a spirit to communicate, and sometimes it may take just a bit of time for the spirit to build the energy it takes to formulate an answer.
Always have a partner. What good is evidence when nobody else witnessed it? Also, sometimes we’ve got the best EVP’s when dialogue between 2 people is going on. Almost like, the spirit wants to be involved in the conversation.