Find people who will cheer you on, say the hard things you need to hear, encourage you when you are on the verge of quitting, and lend support when life throws inevitable curveballs. We are not meant to do life alone!
Keeping the habit alive is a powerful act. It's easier to stay in shape than to get in shape. It's easier to keep a house clean than to get it clean.
Many days it may feel like you are treading water, but maintaining your progress saves your future self a great deal of work.