I've applied the same "make it as easy as humanly possible" to other habits (working on something for 5 minutes, for example) and it seems to work really well.
I believe the reason this works for me is because 1) it's laughably easy at the start, and I can knock it out in practically no time, and 2) I ramp up slowly enough that by the time it actually starts feeling difficult, I already have the habit established. The surest way for me to abandon a habit is by trying to do too much early on.
Another thing that is death to my habits is feeling guilt/shame about missing a day. If you miss a day, don't beat yourself up. It happens. Just remind yourself why you picked the habit, and try again. Maybe lower the difficulty a bit next time.