Backup your SHSH locally

[stevebostedor]

Here's a cool tool to back up your SHSH blobs locally so that you don't need to modify your HOSTS file to point at Cydia's servers.

The Firmware Umbrella

 

[MikesTooLz]

Its recommended that you backup for each Firmware version.
Umbrella lets you backup the SHSH without needing to be jail broken.