Slice off pineapple top; cut pineapple into lengthwise eighths. Place rind side down on cutting board. Cut meat from rind with sharp knife, following curve of fruit. Remove any remaining eyes with point of knife; cut off core. Cube and chill pineapple.
Wash, hull and chill strawberries. Pare grapefruits and oranges with sharp knife, cutting completely through white portion; remove sections one at a time, cutting down along one side section and gently lifting other side away from membrane with knife; chill.