You might not connect with the following metaphor but it works for me.
I've been running 'competitively' for 50+ years. I don't think a lot about the 'how' of running; I reckon I know how to do it and I just get out and run. If someone asked me to describe how to run I'd have to stop and think because, for me, I just put one foot in front of the other and lean forward. The way I run is habitual and just happens.

2 posts ago I wrote about the importance of making sure your big hairy goals are put out there for others to see. I think this gives some accountability and impetus when things start to drag or halt. I used the example of my goal to run 100 miles (160k) at the Tarawera Ultramarathon in February. I noted that I had been given advice to really establish my 'why' for doing such a crazy thing.