I was at the bank today making out a deposit slip when I realized what I had just written:
8/9/10 - How often do we get silly little things like that that catch our attention?
When I go to bed and see that it is 11:11 on the clock it is ok. When I see 12:34 I know there will be a problem getting up. 1:23 and 3:21 are total disasters that fortunately I have not seen in a very long time.
There are other things like this though that have symbolic value. The best I can think of off hand is Veterans day: the 11th hour of the 11th day of the 11th month that ended World War I in 1918.