You need to figure out how much your structural home is valued. Then you need to figure out how much your contents (clothing, furniture, toys and such) are. Check around your area for the cost of a new home (sq footage) for replacement cost. I say this because if you are under insured and have a problem (like a fire) and lose everything you will get a lesser amount and you may not be able to rebuild your home like a neighbor of mine had a few years back and had to find another place (lot), a new loan and rebuild.
Your natural disasters are floods, hurricanes, earthquakes, tornadoes and fires (from lightening). It depends on where you live as to which ones are more prevelant (I have to watch out for tornadoes and hail). Check with your local building department about flood plans to see if you need additional flood insurance.
Another cost in policy is the size of your deductible. Many companies are suggesting $1000 deductibles which means you must always have this amount up front before the policy pays for anything and in this economy that may be a tough one to swallow.
These are some ideas that I give you to think about. Also if you have any special amounts of jewelry over and above what the policy will cover you might want to think about a floater endorsement (this could be for silverware, cameras, computers, or other high valued items).
Good luck with your search.
The other S.