iOS 7 is coming tomorrow. As exciting as that might be, major platform updates are almost always very buggy, so you should back your stuff up before you dive in. Here's a quick refresher on how to do just that.
- Connect to Wi-Fi.
- Go to your settings and click iCloud.
- Select Storage & Backup.
- Tap Back Up Now. It should take only a few minutes to back you up on iCloud, depending on when you last did this.
- Plug your phone into your laptop.
- Select the Summary tab.
- Scroll down to the second section. Under Manually Back Up and Restore, hit Back Up Now. Your phone and your computer will automatically start saving all your stuff. Again, this should happen pretty quickly, depending on when your last backup was.
Once you're all set, you're free to upgrade in peace. [h/t @CultofMac]