Spare chargers are good - like one for each of you for work and enough at home to charge 4 overnight I guess. A spare battery in is good. Spare cartos and plenty of spare juice.
On the manual Bloog you can put a standard resistance DSE901 atomizer and drip tip for testing juices (LiteCigUSA.net has both), if you get a couple more plastic and delrin 510/901/KR808D-1 drip tips there, they are great as a comfortable mouthpiece on a KR8 cartomizer. And super easy to pull out to add eliquid. (I always remove the carto from the battery when adding liquid)
Eliquid - Try some of the Vapor4Life and SmokelessImage sampler packs of cartos to find stuff you like. The WOW Tobacco Shop sampler at Vapor4Life was my favorite and the WOWbacco and WOWboy in it are very nice (two cocoa tobaccos but WOWboy adds a bit of mint). Note - those WOW cartos are HOT so you will appreciate a plastic or delrin drip tip as a mouthpiece. You may even want to try the WOW samplers one nic level lower than your usual because they can pack quite a hit. I use a couple of Vapor4Life WOW juices (WOW Vanilla which is more cotton candy-like, and WOWbacco) and in other juices I use PG juices with 20% or less VG in my cartomizers. Anything thicker I like I will usually drip on an atomizer at home (mmm like FreedomSMokeUSA Hopscotch and Voodoo which are 50/50 juices). In cartomizers I also avoid using juices that drop a lot of flavoring sediment because that will gunk up a carto and ruin the drag and shorten the good performance of the carto.