I start my day off at work every day by heading to Daily Dose of Imagery and looking at the beautiful photo of the day. Often, I use that picture as my Windows wallpaper for the day (right-click, Set As Background). It helps that the photographer lives in Toronto, like me, and I often recognize the streets and buildings in the pictures.
It's interesting to me that some of the most mundane subjects make beautiful pictures (a brick wall, a streetcar, a bug...)