...as a car or home owner. I was thinking in the car the other day about the things that I learned since taking my first job that not everyone might know, depending on how much experience they have. Here are a few:
If you are turning off the water in your house for an extended length of time, drain the pipes! Otherwise, if a pipe bursts or freezes, you'll have a mess on your hands.
Running toilets will often quit if you jiggle the handle.
If the car steering wheel locks after you have had the car parked for a bit and you can't properly start it up and go, try jiggling the steering wheel a bit. It will unlock.
Furnace filters really do make your air cleaner. They need to be replaced every few months and there is a little sign on them that tells what you need. One size doesn't fit all.
When you hang heavy pictures, you need to find the piece of wood behind the drywall that runs up and down (the stud) to put the nail into so the picture will hold. These are located at regular intervals. You can get a studfinder for less than five bucks at the store, or else try knocking on the wall, and you can here where it echoes differently.
When hanging a picture, put it against the wall where you want it and mark where the top comes with a small pencil mark. Then measure the distance on your picture between the place for hanging it on the back, and the top of the picture. Using a measuring tape, mark that spot on the wall beneath your first mark. That's where the nail should go.
Most tire places want you to buy all four tires at once so that they wear evenly. They should also be rotated from time to time so that they wear evenly. Costco gives a lifetime warranty on tires and is pretty reasonably priced.
As your car gets older, it may need oil even between oil changes. Check it regularly.
All cars come with a jack, which is usually located under the spare tire. Just be careful to park the car on even or solid enough ground that it isn't going to fall out when you start cranking (could be dangerous for you!)