One nice thing about visiting the parental homestead is that I've had a little more time to practice. They own a Steinway grand, inherited from my grandparents, and that serves my purposes very nicely.
Just one thing makes practicing feel awkward: the vocal warmups.
It's hard to explain without a sound sample, which I don't have and would prefer not to provide. What you're supposed to do is sing the vowel "E." You start as low as you can and go up—not singing a scale, but hitting every pitch there is in between the usual notes. You go as high as you can without tripping over your register break (the pitch between your chest voice and head voice), then go back down the same way. It sounds kind of like an ambulance siren going by.
This is an excellent warmup. This is also not something I want other people, like, say, my parents, to hear.
So far I've been doing them just after my morning shower. The hair dryer drowns me out. I hope.