B8: Take the B8 to 18th Avenue and Ocean Parkway.
Walk up the Service Road to end at 591 Ocean Parkway
(Between 18th and Ditmas Ave).
http://www.mta.info/nyct/maps/busbkln.pdf

F Train: Take the F train to 18th Avenue. 
Walk east 5-blocks towards Ocean Parkway.
Cross Ocean Parkway and turn left onto the service road.
Walk up the Service Road to end at 591 Ocean Parkway
(Between 18th and Ditmas Ave).

http://www.mta.info/nyct/service/fline.htm
http://www.mta.info/nyct/maps/submap.htm