On the phone, “Open appname” when I’m going into a membership store while wearing gloves; starting timers (on watch as well), making phone calls (either in Contacts or by number). I’ll also use it to open apps if they’re buried in folders and/or on other home screens.

Set up a separate Apple ID for work. Keep your work and personal data completely separate. In some companies you might have to turn in the phone for inspection, and you don’t want them looking through your personal information.

A lot of doctor's offices or hospitals or even schools use a "dummy" number as their caller ID—sometimes it's the main number, but often a closely associated number. In one case the main number is XXX-8100, and the dummy is XXX-8200.

I always add the dummy number to my contact page for those companies/organizations so that their calls can come through. It's sometimes a problem when you don't know which clinic is calling, but fortunately most leave enough information on a VM if you don't pick up the call.

It irks me, though when someone uses their personal phone to return a call, because that number will go directly to voicemail, and in several cases has resulted in a delayed answer or problem solution. I've warned people about that and urge them to either give me the number they'll be calling from or use their office phones.