If someone treats you out, does you a favor, or gives up their precious time to help you problem-solve, do it back. If you want to be less overt, then reciprocate the next time you meet with them. Or surprise them with their favorite snack, flowers, or tickets to a sweet show. When someone pays it forward to you, you can either continue spreading the positive energy or let it die with your taking.
You’d be surprised how great you feel after showing your appreciation.
Make it a habit and you will be surprised at how often life works in your favor.