The number one most dangerous mistake is not knowing how/when to dispose of ashes properly. They can cause a fire long after you think they are burned out. They can cause a fire after you hold them in your hand and they feel cool to you*. Never, never, never shovel old ashes into your regular trash can. Have a metal can they go into and leave it outside away from the building until trash day. Then put it into the bin with the other trash. Old coffee tins work well. Fill with ashes, top off with water, cover tightly and set outside.
Also, never spread the ashes on the ground as they will kill any plants they land on. Ashes + water = lye. It can cause chemical burns to your skin too. Ashes flying around in the air are a serious problem. If one goes in your eye, ash + tears = lye in your eye. It is ouchie and injurious. Keep a pair of safety goggles next to the ash shovel and metal trash can for clean out duty.
Sparks on carpet can burrow in deep and smolder long after you think you’ve put them out. Use a flashlight to check carefully for signs that the spark or coal burned through to the padding before being satisfied that the danger has passed.
Resist the urge to use your fireplace as a way to get rid of paper garbage, especially holiday wrapping paper. Printing inks/coatings can release all sort of toxic stuff as they burn. Light paper can float up out of the chimney still alight and then settle on roof or trees setting them alight in turn.
Get a good set of fireplace tools. Pokers are fun to mess around with but hefty tongs are the most useful. Make sure the business end has some traction, smooth ones can let the log slide around unexpectedly. Make sure they open wide enough to grab a large log securely.
Don’t use bellows. But if you must use bellows, then remember “blow IN, suck AWAY.” Never open a bellows while it’s still pointed into the fire or you will suck up a bunch of sparks and burn your hands (possibly also your house.)
Fire has it’s own will to live. It spreads by fumes, not by flames, and much faster than you can imagine. Have a good extinguisher at each end of the room and make sure everyone knows how to use them. Don’t get the super heavy one your wife can’t lift. Don’t get the one with the massively strong cancerous extinguishing material that you will be hesitant to use. Get one you can squirt quickly, efficiently, and without hesitation. A big bucket of baking soda is a great secondary item. It doesn’t matter if the soda gets old, its job is to smother. (Remember the carpet padding thing!)
Well, I guess I’ve scared you enough for one day. LOL! I do actually love a good fireplace. Nothing says “Holiday” like a roaring** fire. Enjoy!
*Ashes are fantastic thermal insulators. You can easily pick up a live coal with a layer of ash around it and it will feel cool to the touch. Disturb the coating and you will burn your fingers. Drop the “cool” coal in your trash can and it can burst into flames hours later.
** . . . and well-contained . . .