I really got burned out on archaeology in Cataclsym. I not only did the grind on my main to get all the achievements, but I also did it on an alt to get the Vial of the Sands. It did net me two Crawling Claws, but I continued grinding out Tol'vir sites trying to get the Ultramarine Qiraji Battletank. After months and months of no progress towards the last four rares I needed (one Dwarf, one Troll, and two Tol'vir) I decided to give up until Mists of Pandaria.
On the night that Mists dropped, I decided to spend my time trying for Realm First Zen Archaeologist. I spent about five hours on launch night doing archaeology and had a good time exploring some of the more empty higher level zones. This not only got me my realm first achievement, but the next day when I started questing, I had a much easier time than most with quests, as a lot of people had already moved on.
Since then I hadn't really touched archaeology until this week. I've now finished up all of the rep grinds and so now that I have more time I've picked it up again. Currently I'm just going through and surveying all the sites as I do my normal circuit of the tamer dailies. I find that archaeology goes really well with pet battles, as each can take you to many places you might not otherwise go to. Also, doing them together like this seems to work pretty well at keeping me from getting burned out by spending all my time doing one or the other.