7 points you 've already Jailbreak after iOS8.4.1 updates

1. Save SHSH Blobs
You should save your SHSH Blobs
with redsn0w tool to make it easier
to drop the old operating system to use
when you go up to the new operating system .

2. Install Tweak "Cydia Impactor"
You should remember Tweak this because it is important
that it can delete Cydia from your device without
having to connect to a computer .

3.Install Tweak "OpenSSH" for use with SemiRestore
 This program can help you to restore your device Jailbreak Jailbreak after Restore .

4. Solving Reboot Loop
There are still problems to meet crash again , you can click the button Home , and Power buttons to the next when the out sign -old apple has about 10 seconds , you can unleash manually , or you can click the button installed voice to all.

5. Do not install too many Tweak
 Point you have to realize that when installed Tweak too much , it can be complicated when Restore tool it can crash or lose your jailbreak .

6. Delete unused Tweak
 Believe that if you install Tweak not sure that all users , so you should delete some Tweak to prevent problems caused by those Tweak .

7. Do not touch the device 's File System
This point is also important for those who know how to use Tweak "iFile" may confuse browsers and Delete File System tool like this will make you have a problem .