To make sure your values and goals are always on your mind.
Checklists are great for making sure. Usually, these are physical things you need to get or do, and many times they are a one-off tool. But you can use them to make a daily mental checklist of what is important to you: goals you want to achieve, habits you want to change, drop or create, values you need to remind yourself of, etc. If you have such a list, you can simply check off items daily making sure they are consciously on your mind.
Checklists are very useful but are not available everywhere on your device.
Add a basic feature of the OS that enables you to attach a checklist to any item like a calendar appointment, reminder, note, etc.
Checklists are very beneficial to making sure you do not forget routine but important things. Their usability diminishes as time goes on because you start checking them out without thinking because you “already know” from constant repetition.
Use checklists that dynamically change both the order of items (where applicable), and the phrasing of each item. This way you will have to pay more attention even after doing the same checklist many times. The more combinations there are for the checklist (and this can be expanded over time, even having some often used old versions removed for a time), the less the chance for automated and risky checklist fulfillment.