The Four Laws of Ecology (as formulated by physicist and ecologist, Barry Commoner). These laws can also be applied to your daily life.
1) Everything is connected to everything else - humans and other species are connected/dependant on a number of other species. Every living thing is interconnected on the planet. If you really dwell on this law then it becomes very hard to practise anything other than compassion and harmlessness.
2) Everything must go somewhere - no matter what you do, and no matter what you use, it has to go somewhere. For example, nuclear waste does not just disappear, it has to go somewhere. Poor people do not disappear they go somewhere. Anger does not disappear it goes somewhere. If repressed it is locked in the body. If expressed poorly it can be locked in someone else's body. Joy can also be held in the body or circulated around the world. If you practise this law then care for the planet becomes a more sensible way to live than wasteful living. Also joy becomes a more sensible way to live than anger.
3) Nature knows best - Like it says, nature knows best. As much as people think that nature can be improved upon or reinvented Mother Nature has an innate and incredible intelligence. When humans tinker with that intelligence unintelligently then dire results can follow. Global warming is one such consequence. Global pollution another. When you live by this law then you will want to eat more naturally, follow the innate wisdom of your body, and care for the earth.
4) There is no such thing as a free lunch - This law basically means you have to do something in order to get something in return. If you want to be successful you need to get going in life. If you want more inner peace then you need to meditate more often. If you want to be more healthy then you need to be more mindful about your nutrition and daily exercise. If you want more friends then you have to connect with new people. When you follow this law then it is very hard to be complacent and easier to take meaningful action.
Blessings, Steve http://www.prosperitygame.co.uk/