Look hard for optional stuff.

Here's a repost just for you; I'll have to repost very soon again for those of us with normal per page settings.

Come to us, in times of leisure
Don't be blinded by the treasure
Maximising your potential
thrice from seven, quite sequential.

Found by the nimrod that arrived
In home of minds which us contrived
then headed linearly forth
four times, though still far from the north.

Wrong guesses:
Terra Guardians
The mirrors in Ipsen's Castle
The 'Aloha' equipment
Mognet
Chocobo Air Garden
The Treno shop monsters
Any/all of the Coffees
Chocobo Hot&Cold
Daguerro
Fossil Roo
Kuppo
Feeding Moguta
Hidden item around Oeilvert
Mognet Central
Tantalus
Chocobos
Festival of the Hunt
Frog catching game
Sagittarius
Jump rope game
Chocograph pieces
Card Phantoms
Genomes
Black Mages
Hilda Garde III
Exploda
The Jewels

Hints:
The answers are related to a mini-game.
The answers are not related to the main plot.
The part about the nimrod relates to Lindblum.
The answers are not abstract in any way.