Turning up is 80% of the challenge.
When you get to the gym, you may as well start working out, you may as well do another rep after one, a different machine after that one...
You very quickly go into auto-pilot.
It is the getting there that is the hardest part - especially when you aren't forced to, when it is optional.
Focus all your efforts into simply starting.
Just open that software.
Just write one line.
Just pick up that pencil.
Just walk out your door.
Just turn up...