The liturgy for the dead is an Easter liturgy. It finds all its meaning in the resurrection. Because Jesus was raised from the dead, we too, shall be raised. The liturgy, therefore, is characterized by joy, in the certainty that “neither death, nor life, nor angels, nor principalities, nor things present, nor things to come, nor powers, not height, nor depth, nor anything else in all creation, will be able to separate us from the love of God in Christ Jesus our Lord.” This joy, however, does not make human grief unchristian. The very love we have for each other in Christ brings deep sorrow when we are parted by death. Jesus himself wept at the grave of his friend. So, while we rejoice that one we love has entered into the nearer presence of our Lord, we sorrow in sympathy with those who mourn. - Book of Common Prayer pg. 507.
St. Peter's has a Columbarium garden where ashes of loved ones can be interred.
Death is a part of living; thoughtful Christians acknowledge this and prepare for it. For the Christian, the time to prepare for one’s own death is when one is sound of body and mind. Planning ahead allows family and friends to deal with their own grief at the time of death, and will lighten the burden of the many details to come. Here is a link to a form that will help you plan.