Learn the difference between these two pics and you'll be fine.
Guy who smokes cigars:

Fucking tool:

Don't ask me what I'm smoking.
Don't keep relighting your cigar. If it isn't burning correctly get a better cigar.
Don't smoke it down to the nub. It's not a joint. Set it free at about the last third or so.
When done let it burn itself out in the ashtray, unless there's an annoying 20-year-old kid asking you what you're smoking in which case grind it out in his ear.
Take the band off. Only assholes leave the bands on. See above pics.
Don't obsess about cigars, smoking, paraphernalia. Just go buy a few decent cigars, a cheap cutter and a disposable lighter.
Smoke alone, preferably inside or protected from the wind. Ask yourself if you're really enjoying it. If not, move on to a new "hobby".
Don't ask me what I'm smoking.
lefty