We need only a list like this: "Doctor My Eyes," "Jamaica Say You Will," "Running On Empty," "Take It Easy." Enough? Yep, that would Jackson Browne, back after a four-year absence, with a show at Whitney Hall on August 12. Sara Watkins, known around these parts as the fiddler for Nickel Creek, will open. The show is certain to draw a WFPK-listener-heavy crowd, with gray hairs outnumbering young beards by perhaps a small margin. Tickets are a not-too-bad $44.50.