I've tied mine in with home automation stuff. So I can turn on and off lights using voice, even if I'm not at home. I sometimes forget to turn off my workshop and I can do that from anywhere.
I'd like to figure up a way to reset my internet, because I access cameras, and it goes out sometimes. I'm very sure this can be done.
I also use her for weather, although I'm annoyed about some of her limitations there, and I intend to get exactly what I want by coding. I want to be able to ask things like "when will it rain next", but Alexa can't do that.
She can also do reminders in a week or whatever, I use that some. And I ask very simple questions that she can query Google for, but honestly she's terrible at it.
I also think she's too verbose, even with verbosity turned down. She just goes on and on sometimes workout being asked--like instructions on resetting the routers if she can't contact Amazon.
I also try Google assistant and Bixby. I use my watch for a lot of the things you said you use your phone for.
Anyway I'm not happy with any of them. I plan to work a bunch on some skills as my next project, after the current one is done.