Some stuff gets done a lot, the same way, over and over,
on cell phones. Like texting the person you are picking
up "I'm on the way". These things could be automated.
I propose the cell phone have a macro button. The
macro then walks thru launching the app, entering text,
sending etc.
For a small number of macros you could
press the button itself 1 or more times to launch the
corresponding macro. For example I press twice to text
my daughter "I'm on the way". I press once to text "I am
waiting outside". Etc.
A physical button would be good because the phone could
stay in your pocket. More complex macros could have
the macrobutton and a character key, which would
involve looking at the phone (which I want to sidestep).