Whether or not we believe in goblins, most of us live with plenty of ghosts: people we have known, paths we did not take, dreams we set aside. There are always more of those than of us--only one of each of us--an excellent argument that we ought to learn to live with compassion.
If we do choose to explore contact with our brethren who have crossed beyond the veil, it's important to use both common sense and spiritual safety tips when we do so:
1. Secure the area. Work only in an area you know, or are very familiar with. Close and lock the doors and windows, and otherwise invest in safety measures. Conjuring outside is fine, but best if attempted in your own back yard, a private space, or a borrowed space available only to your group for the evening.
2. Close your circle completely. Sweep away all dirt and debris before you start your artwork. Use your best chalk (or other medium). Then, be sure that you finish the ritual in both word and deed.
3. Prepare yourself thoroughly. Meditate, take a ritual bath, be ready to do your part.
4. Oh--make sure that any fancy costumes are in keeping with the location of your ritual. If you will be outside, be sure you are careful about anything trailing, elevated or brand new. Glittery goodies are fun toys. I'm just saying that you should proceed with caution.
5. Choose your companions with care. Many times, we create rituals that require various levels of trust. Making certain that you don't have to reserve a corner of your mind to monitor your buddies will save space for the possibility of a beautiful experience.
6. Be aware of your goal (and make sure everyone agrees with it). That will make it easier to coordinate the ritual with any props or other supplies you might need...and could possibly make the feast afterwards a little more comfortable/less snipey.
7. Know that this is not your only chance to confer with the elders, or __________________ (fill in the blank with your purpose). You don't have to go overboard with cost, bling, or anything else.
Final words: Have fun! Be present! Enjoy your magick hour. Be good to yourself and your companions, and the ritual will be good to you. Take good notes, so that tomorrow, you can decide what would make next year even better.