If you decide to take the dive and install today's Windows 10 phone preview, chances are you'll encounter some bugs along the way. If things get a little too hairy for you, Microsoft has a nifty recovery tool available that will roll your device back to Windows Phone 8.1.
Should you need it, you can grab the Windows Phone Recovery Tool from the source link below. The tool will erase your device when rolling back, but it will also offer you the option of restoring from a back-up while setting the phone up again.
If you're mulling over installing the preview and find yourself waffling back and forth, be sure to check out some tips and things to consider before installing.
Thanks for the tips, everyone!