I'm very guilty of chain vaping. Doglips' quote is an accurate description of me: "I chain vape like a research monkey".
I have one on a lanyard around my neck while awake. At night, I keep it on the table by my bed. When I have to get up 2 or 3 times a night to change the propane tank in my heater, it's like... vape, vape, change propane tank...vape, vape, sleep. Repeat.

I used to hurry and get my shopping done so I could smoke, now I take my time and sneak a vape when I think no one is looking. Sheesh, I'm a vapeaholic. I'm probably taking in more nicotine than ever, but at least I'm not getting the 400+ carcinogens that I used to.