[Q]: Objective: To decrease the chance of MDF warping when using it as a base for a router.
[A]: Use a thicker piece of MDF.

[Q]: Objective: How do you indicate there is mail in your mailbox?
[A]: Raise the flag upright to indicate mail.

[Q]: Objective: To prevent becoming sick when riding amusement park rides,
[A]: do not eat food before riding the ride and stay hydrated before it.

[Q]: Objective: how can I make my door hinges stop squeaking?
[A]:
To stop squeaky door hinges, apply a lubricating oil to the inside of the hinges. If they keep squeaking, use a hammer and nail to tap out the pins inside of the hinges and then coat them with white grease, motor oil, or cooking oil.