If you and your other half want to have a private conversation in the car without the dcs listening in, loudly mention sex, and they will instantly plug in their mp3s and turn the volume up to maximum. Then you can discuss whatever you want.
Buy lots of lovely fresh fruit, because you are a good mother, then lob it straight into the bin, to save it having to sit in the fruit bowl and go off for a week, because you are a realistic mother and know that the dcs aren't going to touch it.
Resign yourself to the fact that, if you do this, at least one of the dcs will come and whinge at you because there's no fruit.
Invest in pieces of plastic fruit to send to school in the dcs' lunchboxes. This way, instead of an apple or banana travelling to school each day, being ignored at lunchtime and brought home again, to go back in tomorrow's lunchbox, until it is too battered to be used again, your dcs will always have a fresh and crisp looking piece of fruit in their lunchboxes. You'll save money on fruit, too.
When your ds brings home his PE kit at the end of term, do not even think about opening the bag. Send it straight to either the MOD to aid in the development of biological warfare, or to a local pharmaceutical company, for the purposes of research into new and unusual bacteria.