Three principles that truly describe being green are "Reduce" "Reuse" and "Recycle" which apply also to individuals where one uses only what's necessary, avoids consuming excessively, ceases the consumption if it's not a necessity and reuses or recycles when possible. Three rules can also be fruitful for entrepreneurs or community. Adding creativity to the recycled could lead to award winning eco-friendly products. At least you are already lessening the cost of living life as well as of natural resources.
However if you really desire to be responsible for society and environment, TAT's Green Plus has these operational guidelines for you.