Grass roots.

Everyone's yard or garden requires tending.  Got a bare spot in need of new grass?  You can't just throw down some seed and wait for it to take root.  You start by preparing the area to make it habitable for the new seed, but you have to keep the seeds moist and create the right environment to coax them into growing into a lush, green turf.  Maybe missing a day of watering doesn't matter, but what happens if you miss two days...or three? Positive change is hard and doesn't happen without effort.  The effort itself doesn't need to be hard, but it does need to be accompanied by consistency to give the roots a chance.