It is said if you put a pot of water on to boil for 30 minutes and run your fingers through the steam, one finger at a time, while calling to the person you want to see, the spirit will become visible to you. It may even be possible to capture a digital image. Lots of people have successfully used this method, so if for some reason it doesn't work the first time for you, try it again. I have no idea why it works, but it does. I know a lot of people believe like I do that the afterlife is very close to the world we live in now. Perhaps this is one reason that we can see spirits. I do know the deceased want to be heard just as much as we want to here them. Just don't be afraid when it happens!
In my opinion, the reason so many paranormal groups successfully catch EVPs is simple: The spirits want to be heard, in many ways. When a paranormal group has a sit down and asks questions, knocking or some other kinds of sounds will often be heard when the tape is reviewed. If someone is taking pictures of the sit down, frequently he will catch something on photo. This has happen to us alot. I will add more at a later time on this subject.