Apple is expected to release iOS 8.4.1 update (already in its beta stage) anytime soon, as speculation is rife that the company is likely to patch up all existing exploits used in iOS 8.4 jailbreak with its forthcoming update.
The catch here is that the iPhone maker will be closing the signing window for iOS 8.4, soon after releasing iOS 8.4.1. This actually gives a very small time frame for avid iOS fans and prospective jailbreakers to safeguard the possibility of jailbreaking, even after future iOS updates.
Here are a few simple steps that you can try to safeguard against potential jailbreaking issues with iOS 8.4.1 release looking imminent:
Save your SHSH blobs for iOS 8.4
It is imperative to save your SHSH blobs on iOS 8.4 as Apple might close the signing window for the latest iOS firmware soon. This will offer you the ability to downgrade to an older firmware version, whenever a new iOS update comes out and obliterates all existing jailbreak exploits.
You could always downgrade to a previous iOS release with working jailbreak, if the newer iOS update does not have any jailbreak support.
Perform a fresh restore
A fresh restore can always help resolve stability issues and other minor issues that you might face with jailbreaking your device.
Install Cydia Impactor
Cydia Impactor offers the easiest way to restore your device to stock firmware without using iTunes or updating to the latest firmware. Thereby, you can still preserve the older firmware with full jailbreaking support, even if Apple releases a newer firmware that kills all existing exploits to render the jailbreak useless.