This is why each expansion I have an "all to xx" where I take all jobs not at level cap to the level cap of a previous expansion (basically the starter level for the new jobs of the current expansion e.g. lv 60 in ShB). The roughest part of that grind was getting through ARR for sure. I also cleared all the side quests during this time, which involved the moogle quests.

Even though there are other sources of exp, I would take advantage of the ones that allowed me to still sit in a queue. Even then, sometimes you just don't feel like doing any of those other activities. Dungeons are the richest source of exp, so I tend to just suck up the queue times.