How do you turn a SaaS tool from a weekly utility into a daily habit?

The hardest part isn't getting someone to try your product or finish the setup wizard it's surviving week three when the initial excitement wears off.

We noticed people stopped logging in simply because our tool wasn't tied to any existing morning routine or trigger. Once we introduced subtle trigger notifications and made recurring tasks easier to set up, retention finally flattened out.

What changed the game for you when you were trying to transition users from occasional visitors to daily power users?