Well, my first class (GLA) is only 20.
I was doing the Logs along with quests, and Gathering activities in an area, I'd keep a mental note if there were any hunting log objectives in the area I had to go to.
I finally finished the Rank2 logs (1-20) and opened up Rank 3 but haven't touched that yet as I'm trying to get crafts caught up and I still need to knock off Copperbell for my Mount (which I wish to do before doing any more Gathering stuff).
But I imagine I'd likely do something similar -- mosey along the areas, picking them off whenever I happen to be in the vicinity if I can find the stupid things.
Sometimes, the log isn't very clear about *where* exactly something is, for example, Bloated Bogies. It says "Western Thanalan, Footfalls".
I looked everywhere down in that watery area, no bogies even at night. Then, finally, I noticed that there was this narrow tiny little passageway from a town to the next area, and.....yup, the bogies are actually There, on the very edge of where it says "Footfalls" on the map, right next to Another area (I forget the name of).
Wish they'd have, I don't know, shaded areas so you know where one area ends and another begins or something. Or, let you highlight an area on the map when you select a hunting log target or something. Also had trouble with the Imps/Rotting Nobles in Drybone.