One all time favorite rule to live by is the Golden Rule. You have heard it: "Do unto others as you would have others do unto you". It sounds simple - and it is, because all it takes is just to think about what you are doing at all times to keep in mind how something you do will affect others. It's all about consequences ... avoiding choices and decisions leading to something that you don't feel like having to deal with further down the road ... when practiced thoughtfully and mindfully for a period of time it will become not a second nature, but it is becoming your nature and who you are.
I have also extended this with a follow up thought: "Undo to others what has been done to you." That works just as easily: if someone has done something to you that you did not like, undo it by not doing it to someone else.