Over the years I've lost my phone a lot of times, but the worst case is losing your phone when it's on silent. So here's a way to find your phone even if it was on silent or even stolen!
Here's what you'll need to do, download an application from the Play Store. It's called "Where's my Droid" and you can get it for FREE!
After you install the app, you're going to set it up. Basically, the app allows you to send text messages with different keywords to help you locate your phone. Simply type the message you want and you're done.
This app helps you in different ways, first you can make it ring even if it was on silent, simply text your phone with the keyword that you chose and your phone will ring loudly. But what if it was stolen? Text your self with the GPS keyword and you will receive a Google maps link that will locate your phone.
There are also some in-depth advanced settings that might help you but the default is fine for me.