A Celebration of Life service for Jim Christensen, 49, of Omaha, Nebraska, formerly of Greenfield, will be Tuesday at 10:30 am at the United Methodist Church in Greenfield.  Burial in the Greenfield Cemetery.  A luncheon will be held at the church following the services at the cemetery.  Visitation will be Monday from 2 pm to 8 pm at the Greenfield United Methodist Church.  Family will greet friends from 6 pm to 8 pm.  Memorials may be directed to the Jim Christensen Memorial Family Trust.  Online condolences may be left for the family at steenfunerals.com.  Survivors include:  Children, Alexandra and Nicholas of Cedar Falls, Austin, Dane and Jenna of Omaha, Nebraska.  Father, Larry of Greenfield.  Mother, Rosann Christensen of Waukee.  Brothers, Chuck of Des Moines, David of Council Bluffs.  Sister, Angie Jacobsen of Waukee.