my goal used to b a v shaped back until i got a pic and realised I already had one...what I did was
4 sets of wide grip chin ups, as many as possible + 2 failures per set
4 sets of lat pull downs, 10,8,6,6 reps increasing weight each time
2x2 sets of bent over single arm raises..(my term don't know the real one), with 40 pound dumbbells..10 reps
then the odd day i would do heavy shrugs, 4 sets of 10
after this for about a month I inreased how many wide gripes I could do by 5 (first set)