pjd,
roger is right. There are many times it seems very overwhelming. Hell, it should be. We're talking about the possibility of very trying times. But, that being said, it always helps when I'm getting that feeling, to work toward preparing some more.
Think about possible scenarios, and then try to plan for them. Do you foresee hard economic times? Then it might be a good idea to try to build your savings, stock your pantry, learn to grow some of your own food, or find local sources of wild food, and local producers you can trade with.
Worried about security? Take a firearms class. Learn to use a gun smartly. If you're so inclined, buy a gun.
Worried about the power going off? Study alternative energy. If you're able, acquire solar panels, wind power, hydro power - what ever fits your situation, etc.
Water worries? Store some - then set up a rain catchment system, if you're able. Check out your area for water sources that could be used in a pinch with purification - streams, rivers, etc.
Even if you're unable to acquire a lot of "material" preps - you can
learn a lot of things that will be useful in the future. Spend your time learning as much as you can - and putting into practice as much as you are able.
Every little step will make you feel a little less out of control. We cannot control how things will go in the bigger picture, but we do have some control over our own response and level of readiness.
And posting does indeed help. Why do you think I spend as much time as I do on these forums?
Kathy