Getting to write every day is an interesting work. My mind naturally wanders to find an interesting topic to write about, as if some direction, some guidance was provided without even realizing it.
I implemented a morning routine about 4 months ago, where the first thing I'm doing straight after waking up is stretching for about 20 minutes, sometimes more. From day one, the back pain I usually had during the day totally disappeared. This kept me going and before I knew it, it became a whole part of my mornings, and can't start my day without it.
In retrospect, I don't even remember why I started in the first place. I just did it. Maybe I woke up earlier than usual and felt stiff, maybe not. Maybe seeing my girlfriend doing yoga inspired me, maybe not. But I really cannot recollect this first stretching.
And that maybe the key. I usually would obsess about writing a detailed plan, weeks or months ahead. Needless to say, I never stick to those and give up after a couple of days. Nothing goes exactly according to plan anyway. That's probably what a plan is anyway: just a bold, wild guess.
So maybe that's the key, yeah – just start doing something, see a quick benefit, repeat. Before you know it, it's already a part of you.