How to find treasure?

also would it be better to search on the beach for some big X's or the ocean?

Other answer:

Daniel:
Have lots of money, specialized equipment, lots of time and patience, and willingness to agree to state and federal laws that determine where, when, how you can recover such treasure, and how much you can keep.

Read the book, Ship of Gold by Gary Kinder to get an appreciation of what you have to go through to find treasure.

Square basher!:
Write a rubbish magazine about fantasy Treasure hunting and the cash will roll in!
SKIPPY:
If you really want to find treasure then look for these magazines at a newstand near you or subscribe.
Daniel:
So finding buried treasure is impossible in the ocean?
Wermestat:
That's actually not legal without a permit. Sorry