If you have a mod holder in your car, don't fall asleep in the passenger seat with your $200 mod in your lap, knowing your driver is going to be on THAT road that looks like they gave Jose a big bottle of tequila and a crayon and said draw the road. Don't then bitch to the driver that your mod fell off your lap, while you fell asleep and they didn't. [I was the driver, the road is a twisting turning monstrosity through a state forest]
If you're rebuilding your coil, and have your fingers on the posts and coils, don't fire the mod with your other hand.
Clean up your kanthal scraps from your desk/chair, because if you thought stepping on legos sucked you haven't seen anything yet.
If you're a customer, and don't want to pay attention to the basic use of your setup being shown to you for the 4th time by the shop you're at, and you get home and break it so it doesn't work, DO NOT throw away your atty, only to go back into the same shop 2 days later and buy the same exact atty, and again ignore the guy building it for you. There are poor vapers who can use your 2nd hand cast offs. [I got to witness this one]
If you've recently put your only battery on the charger, and you go to fire your mod and it doesn't work, try putting the battery in first before you rebuild the atty.
If you're given juice that's supposed to not have nic in it, and you take a hit, ask the owner to make sure there's juice in the tank and that you're not dry hitting cotton in a kayfun, its the equivalent burn of a nic included juice, especially if your manage to vaporize your cotton.
Sweetener is very powerful stuff, use sparingly, try your juice before you add sweetener.
Don't store your fully loaded dripper sideways in your purse, especially if you have anything of value in the same pocket. My crochet hooks were really super smooth and smelled nice for a week.
Don't mistakenly try to use your drink with a straw in it, to fill your dripper.
If you're using your cloud chasing rig in the car, please for everyone's safety make sure there's adequate cross ventilation with most of the airflow being out the passenger side window, your driver will appreciate being able to see oncoming traffic.