How do I find my lost iphone 5?

The Find My iPhone is an app from Apple that allows tracking of an iPhone location. If you have lost your iPhone due to a possible theft or just forget where you put it t your home, you can use Find my iPhone app to find its location. The Find My iPhone is preinstalled on every latest iPhone and can be easily downloaded from Appstore if your device doesn't have it. You just need to enable location services and find my iPhone app on your device and if it is lost by chance, you can use another iPhone to track your iPhone. Follow the steps below to learn how to track an iPhone withoutiCloud using Find my iPhone.

Did you enable the find my iPhone feature? If so go to Apple's website and you can track your phones location.
Also, try calling the people that were in your meeting. Perhaps one of them saw it.

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Phone Tracker for iPhones (Follow your friends with ... - iTunes

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Apr 17, 2014 - The Phone Tracker is a tool that allows you to track the location of another smartphone user. ... Track an employee's travel route. ... This update brings you some new features, better battery management, ... Plus it updates your location more than the person you're trying to track and it's not 100% accurate!

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NO, YOU DONT HAVE RIGHTS TO TRACK, ONLY GOVT HAVE THE PARTICULAR GPS SEARCH TRACKERS WITH SERVICE PROVIDERS. SORRY

On an iPhone you have a Free App to download called Find iPhone.
Generally this is used for locating a lost or stolen iPhone, using another iPhone or Computer and with the ability to remotely play a sound to help locate the device or Delete all the Data on that iPhone remotely.
If you have 2 iPhones or more in a family and they share the same Apple ID Account that you use to purchase Apps (through iTunes) and to Manage & Backup your data & Apps. If both iPhones use the same Apple ID & Password then the "Find iPhone" App can be used to check and see the GPS position of the other iPhone on a map.
The tracking is not saveable as a file. Also www.icloud.com can be used to log in and see the location of all devices in the family (on the same Apple Account).
There is also an App called Find Friends that allows you to track friends current location but it does require & request their permission when first used.
You could also get a free App and install it on the other persons iPhone and simply have it running in the background to remember all GPS location data during a period of time. e.g. a "Pedometer" to track a persons movements. You would require access to the iPhone at some point to recover that data by plugging in to a computer using iTunes to recover the location data. Running some GPS Apps in the background will noticeably reduce the battery as all GPS tracking devices do.
Figure out the details by installing the Pedometer or iTrack App on your own phone first.
TJ

Log into iCloud using your Apple ID and password, then use the "find my iPhone" app to locate your phone on the map using GPS tracking.. There's also an option to wipe your phones data remotely.. Hope you find it!

This must be setup on the phone before it is lost or stolen.
Follow the tutorial below.http://mobilephones.pk/reviews/how-to-track-your-apple-iphone-tutorial-pictures/

No, thankfully. The only way you can be tracked using your iphone is if you allow apps to track your location or if your cell carrier gets a warrant from the police for your location