Driving from Los Angeles International Airport (http://lawa.org/lax), take Lincoln Boulevard CA-1 north and turn left on Venice Boulevard.
Taking a public bus from LAX to Venice is quite simple; take a free shuttle to the LAX Transit Center then board a #3 Santa Monica Blue Bus, north; ask for an interangency transfer. Get off at Washington Blvd. and at the NW corner of Lincoln and Washington take the Culver City Bus #1, west. Get off at Pacific and Windward; you are now in the heart of Venice Beach and Ocean Front Walk.