Its Lughnasadh or Lammas tomorrow (Aug 1st). It is the first of the harvest festivals celebrating Mother Earth. The expression 'reap what you sow' springs to mind. Karma is a powerful force. If you put out negative energy it will come back on you. Likewise for good energy. Have you ever held a door for someone or helped someone with their shopping only for a stranger to do the same for you? I have had this happen lots of times. Of course your good deed has to be genuine. You can't just do it in hopes of getting something in return.
Think about it this Lammas and the next time someone cuts you off in traffic remember they willl get theirs!