Some random tips.
If you have a stuck lock or your key keeps sticking or getting jammed, try coating the key with liquid dish soap. It really works!
If you have a loose jeans zipper that works it's way down at the most inopportune times, try coating the metal teeth with superglue then work the zipper several times until the glue dries. It will add resistance and keep the zipper in the proper place.
Pouring rubbing alcohol on an ink stain and rubbing with a soft cloth will remove all but the most stubborn pen marks.
Put lemon rinds down the garbage disposal and run it without water to kill lingering germs and smells.
When storing fresh herbs in the refrigerator, place them stem down in a cup of water. They will last for weeks instead of days.
If you have a stale bag of chips, you can spread them on a cookie sheet and bake them at 350 for 5 minutes to make them good as new.
Instead of buying expensive car washing products, use regular liquid dish soap. It will get your car squeaky clean without streaking.
Use household vinegar on oxidized black molding, rubber parts and tires to bring back the original lustre.
Pure lemon juice will clean the worst greasy stains on stove tops and vent hoods with very little scrubbing.
Pouring a coke on your car's corroded battery terminals really does work. It can keep you from getting stranded.
Keep a can of WD40 in your car's trunk. If your car stalls out from driving in deep water you can spray it under your distributor cap and on the spark plug wires to displace the moisture and get running again.