Here is a great place to start for anyone new to jailbreaking - TUTORIAL - Cydia - A beginners guide to the Jailbreak App Store
Fortunately, because the next jailbreak will work on the "current" version of IOS at this time (6.1), everyone will have a cushion during which time they can easily restore their device and re-jailbreak if they really muck things up for whatever reason. Mucking up a jailbreak so you need to restore is quite difficult, but folks still manage it, normally because they do things that they don't understand properly. For example, because they have access to the full file system of the iPad, they start to delete parts of the operating system :O
The interesting question will be, how long will Apple allow the jailbreak exploits to remain active before they release 6.1.1?
This could be anywhere from a few days, to many weeks, but you can be sure they will patch the vulnerabilities eventually.
As soon as a revision to IOS is out which blocks one or more of the exploits, then folks will have to manage their jailbreaks VERY carefully. As lots of members here can testify, one very careless move can result in you having to restore your device and lose the ability to jailbreak, at least until a dev-team releases a new jailbreak for that version!
There were lots of folks who messed up their 5.0.1 jailbreak and had to wait a while until the 5.1.1 jailbreak came out to get their jailbreak back!