Trevor: Every Picture Tells a Story (100 Times)
My idea is each day to take a photo of the number for that day. They may be found anywhere throughout the day, but must occur naturally (so a book page may only be used if that I am up to that page on that day). This entails looking at every occurrence throughout the day in order to spot the number, often necessitating looking at things differently than you usually do. The photos will be taken on my phone, since that is with me at all times.