I have too many bad habits - put pins in my mouth, use rotary cutter in my bare feet, don't change needle in sewing machine, don't clean machine often enough, don't change blade in rotary cutter when gets dull, sew over pins, throw my threads on the floor, don't put things away when I am done a project, etc ......
But a positive habit is all my fabrics are folded and organized by colors in my cabinets or groups in tubs! I like my eye candy to be neat!