With just under a month to go until Cataclysm and no new content (apart from a few pre-event quests) released in the last few months, what is a hunter to do with his time? Well one can take a break until Cataclysm arrives, continue with the current boring raid-schedule and clear ICC for the upteenth time, or one can finish off any achievements and preparations for Cataclysm.
The first thing I would recommend for any hunter to do before Cataclysm, is to travel Azeroth and fill their stable with any pet types that are missing. This will ensure that you begin the new expansion with a full complement of raid buffs available to you once your leveling to 85 is complete.
Next I would suggest finishing off raid achievements such as the requirements for the Rusted proto-drake in Ulduar or the more sought after Frostbrood Vanquisher in Icecrown Citadel. Besides being probably two off the coolest flying mounts, they are also 310% speed meaning you would not need to purchase the flying skill come Cataclysm. Also the Ulduar achievements are now relatively easy to complete in ICC gear.
If you have already finished those achievements or maybe your guild is simply not capable of completing them, then Zul'Gurub would be my next suggestion. When Cataclysm arrives, Zul'Gurub will no longer be available, which means the Swift Zulian Tiger and Swift Razzashi Raptor mounts will no longer be attainable. Besides the two mounts there is also the Razzashi Hatchling companion pet and Polymorph: Turtle tome which drop in this instance. At this point it is unclear if Blizzard will remove these as well or offer alternative means of attainability.
Next I would recommend players use this time to level up any professions that need leveling. As boring as that may sound in some cases, consider that this means just one thing - gold in your pocket. As far as information about all the professions go, all of them will have fun components (mini-pets, mounts or novelty items) as well as their usual crafting and gold making components. So why not get up to date now, than being behind the ball and missing out on any of the profits that are surely going to be had early on in Cataclysm. Also consider that gathering professions such as skinning, mining and herbalism will be the most profitable early, when supply is low, and crafting professions will be the most profitable once supply and demand have been established.
Lastly I would suggest completing the Explorer achievements. This will allow you to see Azeroth as it was first created, because once The Shattering occurs the world will be different and certain sights may be lost forever. Some of the most changing zones include Thousand Needles, The Barrens, Desolace, Darkshore and Stranglethorn Vale.
There are certainly more things that one can choose to complete, but I feel these are the most important, as they involve things that help preparation, involve things that will change or disappear forever.
So good luck on your adventures and keep on hunting,