Hey fellow Final Fantasy X explorer! When progressing through the sphere grid, focus on unlocking key abilities and stats for each character. Try not to waste too many spheres on minor upgrades early on. For side quests, don’t forget to complete the monster arena challenges for valuable rewards. When building characters, consider specializing them in either physical or magical abilities to maximize their potential. And always make sure to plan your route on the sphere grid ahead of time to avoid wasting spheres. Happy exploring!