Hey fellow Final Fantasy X explorer! When it comes to sphere grid progression, focus on unlocking key abilities for each character first before branching out. Don’t be afraid to backtrack to grab important nodes. For side quests, be sure to complete the Monster Arena challenges for awesome rewards. And for character builds, customize each character based on their strengths – Tidus for speed and agility, Auron for strength, and Yuna for magic. Experiment with different paths to find the best setup for your playstyle! Happy exploring!