Ask MetaFilter has an epic thread on things you were doing wrong. There’s a good chance you’ll learn about something you’ve been doing wrong (or at least suboptimally). For some reason, a disproportionate number of people seem to have spent most of their lives mispronouncing “segue” (it’s pronounced like the Segway). For me, it was that you can eat a kiwi by slicing it in half and spooning it out like a grapefruit, or lopping off the top and digging in like a soft-boiled egg. No need to peel it.
(pic via eBaum’s World)