I've been vaping about 7 weeks now. What I have figured out so far...
Have a spare battery to go along with your other spare battery.
If using cartos: If you think 3 will be enough to get you through the day, take 5.
If using tanks: If you think 2 will get you through, bring 3
After a few weeks...
Oh wait, why am I bringing all these extra cartos or tanks, I can just carry that bottle of juice and reload. DOH!
I have just started to look at the modding aspect of vaping and it scares me. The modding/tinkering part doesn't scare me, it's the damage that will potentially happen to my bank account that scares me if I get really interested in it.