Set up a digital medical bracelet
If you think you might die without your iPhone, well, you might be on to something. See, you can set things up so that certain critical medical info can be accessed from the emergency section of your lock screen -- should anyone, EMT or otherwise, find you unresponsive with your phone nearby. To do it, go to the Health app and fill out your Medical ID.
Speed things up by clearing individual app caches
Occasionally, certain Apple apps can be the root cause of all your phone’s wonkiness. If you notice one is being particularly janky, try clearing its cache. In the Podcasts, Music, Game Center, Phone, and App Store apps, tap any single tab at the bottom of its launch screen 10 times in a row.