Another way is to explore every area thoroughly. There are often hidden items and side quests that can give you an edge. For example, some hidden items can be used to upgrade your equipment, which in turn makes battles easier. Additionally, make sure to learn the attack patterns of different monsters so you can defeat them more efficiently.
Joining multiplayer modes, if available, can also speed up your progress. You can team up with other players and take on tougher monsters together. This not only gives you more rewards but also helps you learn different strategies from other players. And always keep an eye on your character's stats. Allocate skill points wisely to improve your overall performance in the game.
To progress quickly, focus on completing the main quests first. They usually offer the most experience points and rewards. Also, don't neglect your monster companions. Level them up regularly as they are very useful in battles.