You are most likely wondering what this has to do with songwriting. Observe everything as if you are at a market. Be present in every moment and you will find words and phrases to build songs. It's no different than laying my produce on the counter and deciding what to cook with it.
Inspiration is all around you just like the produce at the farmer's market. You just need to pick and choose what you want and make your recipe later when you have all the ingredients.