Check 2000 points off the list. Finally got around to achievement hunting rather than toon building on my 27892374572378936489 alts.
Quick guide for you to get 3k
1. Finish Kalimdor explorer for +150
2. Outland explore for +70
3. Northrend explore for +100
4. Pandaria explore for +70 (skipped cata for now cause it's a pain)
Also do the /love critters while exploring these for +30, Pandaria one can be boosted by p2p and generally not worth searching for critters.
Basically explore achievements are something ppl don't generally like but once you do them all you get sad that there are no more as easy points as that.
5. Darkshore Quests, All Gluttons, Bounce for +50
6. Win a duel?????, get one small AGM, Wrecking Ball for +30
That's 500 right there.
7. Complete Gnomeregan +10
8. 160 recipes, Chef's Hat, 50 & 100 cooking awards, Rumsey Lager for +70
9. Crafty/Ironjaw, Limnologist/Oceanographer while exploring, 3 coin achievements in Dala, Giant Rat for +80
10. Get one rep to exalted for 10 exalteds, if you have a p2p boosting then Timbermaw is fast and gives additional +10, if not then fastest would be WSG or AB (also additional 10) for +20
11. +110 for Midsummer, do while exploring.
Well that gives 790. You can get 210 more by just doing PvP - You have tons of WSG, AB and AV and a little bit of EotS achievements to get.
Most efficient route would be:
1. Do Gnomer, Duel, small AGM and queue PVP before Midsummer. Fish for Ironjaw or Crafty while in queue. If you're ultra lucky and get both, fish in Dalaran.
2. During Midsummer explore whole world, save Pandaria for last if you're short on time as you can't do all midsummers there anyways. While exploring do Limnologist/Oceanographer, decent guides in comments on Wowhead.
3. If you are 100% sure you have enough time, then do Darkshore quests when there and Gluttony when in Azshara, if not then just come back there after the event. You should attempt Bounce when in Hyjal however.
Long-term goals: WSG or AB exalted, Cooking awards, 160 recipes (less if you can only get 100 cooking), one of Limno/Oceano has a fish that only spawns during winter or summer, so you'd have to wait - just keep that in mind.
I also noted character-only achievements, for completing continent exploring you also net additional points for your acc-wide. Also skipped everything that requires p2p help.
Best of luck!