Sorta kinda serious with the subject line. We've been conditioned over the years to be very precise about our steps in working with computers, especially as techies, because we know the limitations. Well, these tools actually remove multiple steps and we aren't taking advantage of it.
For example, when I first tried using it I would say "OK Google, directions to 1234 Main Street, Anytown, USA 21222 - then put in my location, then click navigate. Now, I say "OK Google, navigate to home" and that's it. Or "OK Google, navigate to Chipotle" and it'll figure out the closest one on its own. Much easier and you don't have to worry about the details.
Another example, sometimes I like to sleep for a few extra minutes in the morning after getting ready, so my alarm changes. I'll say "OK Google, set alarm for 7" and I don't need to specific the day, "O'clock", AM or PM, or how often the alarm goes off, the default behavior is setting a one-time alarm closest to your current time. After using it for a while you get used to these shortcuts and it becomes quicker.