Looking in the toilet before you flush.
And you should do it. The colour of your urine tells you how hydrated you are and so if you should be consuming more fluids (hydration isn't just water). The state of your feces can be an early warning system to potential issues even if it didn't feel off when you went.
$100K/yr.
Yes, with inflation it won't go as far in subsequent years, but it doesn't say anywhere that it's the only source for your income, so you can make more money in other ways, like starting a business or investing some of that $100K in a low risk investment plan that will help you later.