Start a habit you will actually keep

Most habits fail because they start too big. Shrink them until they feel almost too easy.

Make it tiny

Instead of "exercise daily", try "do two push-ups after brushing my teeth".

Attach it to an existing routine

Use the pattern: After I [current habit], I will [new habit].

Track it visibly

Mark an X on a calendar each day. Do not break the chain, and if you miss a day, never miss two.

Celebrate right away

A small "yes!" or smile helps your brain remember the habit.