When you hold yourself back from doing a good deed for someone today, give into your instincts and make the gesture.
You are likely to feel the urge to do a good deed for someone today, but you will be held back by thoughts of what's in it for me? and you may tell yourself you do not have time to waste like this. Follow your instinct and make this kind gesture, it will mean a lot to that person, which will bring positive energy to you too. Sometimes a kind act is reward in itself by how it makes you feel.