An indoor cat get makes its own amusement, which often means exploring the home and playing with anything that catches its eye. It is important you check around your house from a "cat's eye" point of view and look for things it might hurt itself on and make sure they are safe. Be aware cats may jump up onto all kinds of surfaces. Just because a surface is waist-height, or even head-height, doesn't mean that your cat won't thoroughly explore it. Put away things what will be attractive to a cat. For example, tinsel, shoelaces, wool, string, sewing supplies are all attractive to cats. If it's long, thin, and snake like then the cat will want to play with it. Make sure these are all tidied away because if the cat investigates with its mouth and swallow a piece of wool the cat could end up with a serious bowel obstruction that requires surgery to correct it. Cats and candles don't mix. Cats love to jump up, so even putting a candle on a high shelf doesn't mean it's safe. In the worst case scenario, the cat won't know it's there, knock it over, and cause a house fire. Always make sure cleaning agents and other chemicals are locked out of harm's way. There are many chemicals we use in our homes that are severely toxic to cats. For example, many common floor cleaners contain benzalkonium chloride. This chemical can cause burns to delicate tissue, such as the tongue or the lining of the mouth of a cat. If a cat walks across a floor still wet with cleaner, and then licks its paws to clean them, it could develop nasty tongue ulcers which prevent it from eating. Many house plants are toxic or potentially fatal to cats. Indeed lilies have no place in a cat household, since the pollen is extremely toxic and causes severe kidney failure. Other plants to avoid include azaleas, hydrangeas, poinsettias, daffodils, and mistletoe. This is not an exhaustive list so always check to see if your plants are feline friendly before bringing them into your house.
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One-sentence summary -- Create a cat-safe environment. Keep toxins out of reach of your cat. Find out if your house plants could be toxic to your cat.

If using new hinges, check to see if they will fit in the spaces where the old hinges were. If they don't, rest them so the bottom lines up with the old hinge mortises (recesses), and mark the door frame along the top of the hinge. Then, chisel out the additional space to widen your hinge mortises. The easiest way to do do this, if the old door was a good fit, is to lay the new door on top of the old door so the edges are flush. Then, line up a combination square with the old door's hinge mortises and transfer their locations to the new door, marking the edges with a utility knife. Remember that the barrel/pivot of the hinge is on the pull side of the door. If you are replacing an old door you should refit the hinges so they are facing the same way as the old one. If the old door was not a good fit or is too different in size from the new door, place the new door in the frame and use shims around the edges to set it in place. Then, using the mortises in the frame, mark the door where the hinge mortises will need to be made in order to line up. The advantage of this method is that you can also mark the latch-hole at this point for easier installation of the doorknob. Lay a protective pad on the floor and support the door on its side. Then carefully extract the surplus wood from the door until you have reached the required thickness. First, hold the chisel vertically and tap it with a hammer to outline the edges of the mortise. Then, make a series of closely spaced cuts that are about as deep as the thickness of the hinge. Finally, hold the chisel at a low angle with its beveled face flat against the wood and lightly tap the chisel with the hammer, chipping away the wood in small pieces. Create a mortise for the plate around the latch on your door using the technique described above. Then, use a drill to make the necessary holes for installation of your doorknob/door handle and lock. This process will vary somewhat based on the doorknob you are installing. Follow the instructions that came with your door handle. Set the hinge into the mortise and use and centering punch to make starting divots for the screws. Then, screw the hinges to the door and ensure the hinges and the screw heads are flush. If you are using hinges with removable pins, you can take the hinge apart and just attach one side to the door. In this case, attach the other side of the hinge to the door frame, and proceed to the next step. Otherwise, skip to step two of the next section.
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One-sentence summary -- Mark the hinge positions on the frame. Mark out your hinges on the door. Cut hinge mortises. Create a mortise and holes for your lock and door handle. Screw on the hinges.

Safety is obviously important when dealing with fire, but you're also dealing with electrical charges and batteries, which contain dangerous ingredients. Wear gloves. Although there aren't many safety measures available in prison to make the infamous lighter from "Orange Is the New Black," you'll want to take safety precautions and protect your hands. Keep a fire extinguisher and garbage receptacle ready. If you need to dispose of batteries, be sure to recycle them. Some municipalities and states, like California, require batteries to be recycled, and your community might have battery collection procedures. Dispose of the battery immediately if it starts to leak. This could be battery acid, which is dangerous and corrosive. You don't want a leaky battery. Plus, you'll need a charge to generate the flame. Most batteries will work, but a AA alkaline battery is common for this type of lighter and a good size. Use two batteries if possible, or a single 9 volt, because one AA battery might not provide enough power. This type of flame will start quickly and burn out quickly. So, have a flammable source on hand to transfer the fire, if you want to keep the flame going. Sheets of loose paper, newspaper, or dry leaves will work well here. It is important to transfer the fire and not let the battery itself light on fire, since it could explode. On most batteries, this should be clearly marked. On a AA battery and other cylindrical batteries, the positive (+) end or terminalknown as the cathodehas a small convex bump, while the negative (-) end or terminalknown as the anodehas the inverse: a small concave indent into which the bump can fit.
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One-sentence summary --
Take safety precautions. Use new batteries. Prepare a transfer source. Find the positive and negative ends of the battery.