We have also done some foraging - mulberries, mushrooms and ginkgo seeds to name a few of our edible finds - and also bringing home useful items including old insulators (they make great candlesticks) and other small useful items left curbside for the taking.
So....to mention it once again....set yourself a walking challenge. Decide the parameters of the community you would like to walk, and a goal about what you would like to focus on (or not) and get out there and walk it! If you are looking for inspiration get yourself a copy of The New York Nobody Knows or A Walk Across America, or one of several other books celebrating walking, and/or check out some of the websites about walking, for example America Walks. If your purpose for walking is more for fitness than exploration America's Walking is a PBS series with some ideas to get you started.
One word of caution, if you google 'Walking Books' to find some inspiration, the first item that comes up is The Walking Dead. Might be best to skip that one.