Me...restock our emergency food, water and medicine (30 days supply of each) as I've done each year for the last 12 years. I'm using 9/11 as a reminder date.
Say an extra evening prayer with the kids before tucking them in.
I'll continue to fly my Country's flag as I've done since I bought my first house.(You see, I, like a handful of others, was flag waving before it became fashionable).
I'll avoid TV coverage of the events taking place, and I'll certainly avoid the vivid images that took place...as I am still "not over it".