When Im tired of dungeons or straight up FATE grinding, Ill grind a little like this:

Pick an area with Guildleves around my level. Activate all 4 battle leves, pick up a few side quests and start, doing quest objectives, and leves at the same time, all the while traveling to FATES as they pop up relatively close to me (even with LEVE timer you can leave one, do a FATE, then return).

Its pretty rewarding to finish all your quests and leves, return to the town and turn in like 8 quests at once, plus the FATES you did while out there.

Ya I know not ground breaking, but its a nice alternative to leveling.