Most of what we do is subconscious, driven by our habits. The rest is conscious, primarily driven by our principles. In addition to dictating our conscious actions, principles also guide which habits we decide to create.
If we want to improve ourselves and become more effective, our habits and principles are the places we can get the most leverage. A good habit like eating healthy can affect nearly every aspect of our lives, just as a principle like always telling the truth can improve our relationships and lower our mental load.
Just as I don't think there's a universal set of habits that's right for everyone, I don't think there is a set of principles that's right for everyone. Even so, it's always interesting to hear what others' principles and habits are, to use as inspiration for creating our own.
I follow my principles very closely, but not completely. Sometimes a situation calls for deviation, and other times I simply fail to stick to my principles. The former is okay, but the latter is something I try to minimize. With that in mind, here are four of my own.