Do you have the only key?Unless you build your own home and bought all by yourself the locks, you should consider that there is another key out there. People often think that by moving to a new home and having new locks, than surely they have the only key and they feel secure. That is a mistake, what about the constructer? What about the owner that gave you the keys? And it goes on.
The first thing you should do when moving to a new home, is to replace your locks or at least rekey them by a professional locksmith. While using a professional locksmith service, it's a good opportunity to learn about how to better secure your home and belongings. Modern technology offers us various locks that serve different purposes and by having a professional locksmith around, you can choose the best locks for your specific needs.
Now that you have the only key you are in control, you just need to know how to handle it. In case of lost keys, you shouldn't have anything on your key chain that identifies your house or address. You should consult with a professional locksmith about your specific key and lock, maybe it's best to rekey your lock, after all "better safe than sorry". Try to avoid using one key chain that has all your keys, separate one from another as much as you can.
Loosing keys is common but we don't always stop to think clearly about the result. You shouldn't panic but you should be cautious and do what is necessary in order to be secure and safe.