That's why we talk to the saints and ask them to pray for us. That's why mediums hold seances, and medicine men seek to hear from the sacred spirits. Even further, we believe, with Judas Maccabe, that it is a good and holy thing to pray for the dead. I can't accept the idea of floating around in some kind of stupefied stasis until the victory of entropy, nor do even avid musicians think that waiting around in a bland room on overstuffed furniture for infrequent chances to jam or perform is particularly exhilarating. Just because I no longer wear a particular body is no more reason to stop learning and working on my spiritual path than trading in a car is a reason for not traveling.
Some folks worry about calling people back and somehow interfering with their new way of living.
The sort of evocations which are sacred to these days, however, or those in which the true selves and inner emotions can be reinforced by the planetary energies and the blessings of the Deity. In the old days, indeed in Hispanic countries now, one would throw a party and set aside places for the relatives who had recently left and portions for others. If you practice scrying or automatic writing, this would seem to be a prime time to try to let folks call on you. Even just lighting a candle and maybe some amber or myrrh incense for them and quietly meditating on them and on what they might like to say could be helpful. If you can find a photograph or portrait of the person you'd like to visit, that will help your subconscious send a more accurate call and to focus more clearly on the essence of the individuals you invite.