It’s fairly easy to miss a bus.
It’s tough to miss an Uber.
When you have an appointment, and a reputation on the line, you tend to show up.
Apps, google calendar, notebooks can take you so far. And for some people, this is enough.
If it’s not, put some repetitional skin in the game – try appointments with real people. Bring in some external accountability.
If nothing else, the hassle of having to change the appointment can be enough for you break through the resistance and stick with this thing you really want to do.
