I don’t remember having this trouble last time I played. Is there something I am overlooking?
As for how you do this, I’d advise you to do what Hawkeye said. Take it one continent at a time. Maybe print off a World Map from GameFAQS and mark off the beaches you have visited to make it easier.
*spoilers?*
The thing is, I don’t think you have to finish the beach sidequest to get the scene where Choco decides that he’s going to stay with Mene and Zidane….
Is there something I am overlooking?
So, am I right in that you can’t get the scene where Fat Chocobo tells choco to stay and Mene tries to fly Zidane out of Chocobo’s Paradise? You’re on disc 4, right? If not, there’s still the Shimmering Island treasure.
As for the Healing Beach sidequest, while you’re standing on the beach, press O and listen for a chime (like the sound when you use a healing item on someone from the menu). I believe there’s somethng like 24 beaches to go to around the world.