Consider whether you want a visitation, viewing, funeral, memorial, graveside service, celebration of life, or private gathering. Note a preferred place of worship or location, clergy or celebrant, music, readings, speakers, webcasting, military honors, clothing, photographs, and the tone you hope the gathering will have.
Specific wishes are helpful, but priorities may be more useful than an inflexible script. Explain why a tradition or detail matters so your family can honor the intention if circumstances change.