Choose a new habit you want to build (e.g., drinking more water).

Identify an existing habit you already do consistently (e.g., brushing your teeth).

Get a roll of brightly colored tape and a marker.

Write the new habit ('Drink Water') on a piece of tape and stick it to your toothbrush or bathroom mirror.

Each time you brush your teeth, the visual cue will remind you to immediately drink water afterwards.