A friend sent this to me from his Employee Assistance Program:

As adults we can become obsessed with watching TV, going on the internet, listening to the radio to stay abreast of all the latest events. We want to know what we are doing as a nation. We want to know who is behind this. We want to know how many casualties. We want to know about our families, friends, and coworkers. We want to talk about the attacks and where we were and what we heard to everyone.

As time goes on we may find we can't watch any more TV nor do we want to talk about the events. Some may see us as insensitive. Our psychological system allows us to take in so much emotional trauma then we do things differently.

What you can do:

Recognize that what you feel is normal.
Talk about your feelings.
Maintain routine in your life.
Keep to your everyday activities, including exercise, taking classes or whatever plans you may have had scheduled.
Structure is very important.
Turn off the TV, the radio, the Internet, for a while to give yourself a break from the events- there will be continuous information provided.
Take care of your medical needs. Stress can trigger physical problems. Be attentive to your physical well being.
Eat healthy meals. Don't increase use of alcohol, tobacco, or caffeine.
Attend meetings, services, and support groups focused on the events.
Support the nation in this time of need.