My favorites that have been said are:
- trusting what suppliers say about the life of parts and a cartridge's equivalency to analog cigs, OR honestly, trusting anything suppliers say for that matter...
- not ordering enough on the first order so a week later I'm left empty handed, waiting on that package in the mail I had to pay shipping for that could have been combined with my first order!
- not discovering e cigs SOONER!
Personal mistake: I've been vaping for over a month and still have trouble figuring out the right kind of stuffing for the cartridge and exactly how much to use. I feel like I waste alot of juice... Any suggestions?