Get the spot x book.
and or sit down with google earth and marine maps , figure out what u think the fish will do with a given moon , tide, wind direction, bait type etc..
And if dont know what fish do, check out tackle shops on videos and books , and watch the fishing mags for good articles on the subject...

Also check out old postes.. but will notice that they only give general areas.....reason is common sence..  the commos will go in and hit ....or next time out its been fished out , or find 1 doz or so boats parking on the spot.

Fishing is like hunting deer.....not like going to the supermarket , or shooting in a farmers paddock.