Looking for Some New Themes

Themes, that is, in the sense of things to shoot with my iPhone on particular days of the week as part of my 365 Day Project for iPhone images: http://boozthroughthelens.posterous.com. I have been doing flowers on Fridays, but flowers are getting scarcer and more difficult to find, especially close to home. Wednesdays have been my "pot luck," anything goes days, but would like to focus on something. On Thursdays, I've been shooting our neighbors' changing tree, but it isn't really changing much these days.

Any suggestions?