Mang Sison, still working after retirement age, certainly understands the concept of additional streams of income.
This picture tells the story.
It reminds me of Fredric Lehrman’s story in Prosperity Consciousness: How to Tap Your Unlimited Wealth, where a worker brings homemade soup to work and shares it with a co-worker. The soup is so good that it develops a following which results in a small sideline business supplying co-workers with healthy lunches.
Are you doing anything in your daily course of activities that could provide you an additional income stream?