While mentioned in 'Characters & Builds', efficient grinding deserves its own spotlight. To quickly raise HP, find a weak enemy (like a Goblin or Hornet) and have all your characters defend. When their HP gets low, heal them with Cure or Potions. Repeat until HP increases. For MP, repeatedly cast low-cost spells like Cure or Fire on your own party or a single weak enemy. Even if the spell misses or is resisted, the MP cost contributes to MP growth. For weapon skills, equip the weapon you want to level and attack repeatedly. For magic skills, cast spells from that school. A common trick is to fight a single weak enemy, have one character defend, and the others repeatedly attack or cast spells on themselves or the enemy until their stats increase, then finish the battle. This minimizes experience gain for other stats while maximizing the desired one.
