The easiest way to set up a Habit is to use the General Task option, which allows you to define a name, add any instructions, and also add an attachment (as a video, picture, file, or a link).
Some ideas for Habits
Sleep before 10pm
Meditate for 5 minutes
Drink 8 glasses of water
Turn off reminder for missed habits
Once you set up your habit, just click on "Advanced Settings" and turn off the option to "Show reminder if missed". This will make sure the task does not show up with a 'Missed' label if a client does not check the habit off.
That's all, and you are ready to go!