There are more ways to finding your missing iPhone than using Apple's own "Find My iPhone" tool in iCloud. If you just need help tracking down your iPhone in your home or at a friend's house, Find My iPhone isn't necessarily the most convenient thing to do when you've got these other options to try out first.
Your Apple Watch is a fantastic tool that can help you perform daily tasks on your iPhone. Notifications get filtered through it, you can respond to messages on it, and you can even use Apple Pay to purchase goods and services. Your Apple Watch is also a valuable asset when it comes to finding your lost iPhone, too.
When your iPhone can't be found, Find My iPhone is a true lifesaver. When you use the feature, you can ping your iPhone and even see its current location on a real-time map. But what happens when your iPhone runs out of battery? Find My iPhone can't locate a dead iPhone, can it? You might be surprised to know it can, to a certain degree.