A puppy learns sit in a week and stay in a month. Stay is always the harder trick, for dogs and people.

Starting something is a moment, and keeping it going is a skill that takes much longer to learn. Beginning has energy behind it, novelty, a decision that felt good. Staying has nothing behind it except your own willingness on a day that offers no reward. That is why almost everyone can start and far fewer continue.

Look at whatever you began recently and ask what staying would look like on a dull Tuesday. Plan for that day specifically: the smaller version, the reminder, the person who will ask you about it. Beginnings take care of themselves.