Hey fellow Final Fantasy X explorer! When it comes to sphere grid progression, my tip is to focus on each character’s strengths. Make sure to unlock key abilities early on, like Tidus’ Haste and Wakka’s Dark Attack. For side quests, don’t miss out on the Celestial Weapons and Aeons like Yojimbo and Anima. As for character builds, consider specializing each character to excel in a specific role, like Auron as a heavy hitter and Lulu as a black mage. Happy exploring!