meditation on opening the third eye, more meditation to develop it, then just sit back and relax, and ask for a spirit to show itself, or you can use a pendulum, or like Barb said, ouija board but they can be dangerous, If it's something that really needs to be done, look around in your community for a medium.
If you wanted decent advice here are some common sense and sophistication tips.
1. Don't make threads that title No Subject.
2. Use propper capitalization in your sentence.
3. Do not put a billion question marks. One is all that is needed.