Backups

[kernellinux]

I'm trying to transition from an online wallet to a local wallet. To the best of my understanding, the only way that my coins can be compromised is if someone compromises my computer itself. I'm wondering about making backups of my keys. I've read there is a key pool of 100 unused keys, in addition to any active keys I have generated. Since the keys in the key pool are unused, it seems like I should be able to backup once every 100 keys I generate without the risk of losing information for one of my active keys. Could someone confirm that I understand this correctly? Furthermore, it seems like this system is basically letting me back up the next 100 future keys. If I just make backups like I would if there weren't a key pool (ie: as of xx/xx/20xx when I created my backup all of my information prior to this date is safely backed up and can be restored at any time without a problem) can I assume everything important has been saved, or do I need to do something else to factor in that key pool for some reason? Thanks.

[drakahn]

the keypool is for change addresses, with a keypool of 100 you would need to backup once every 100 transactions (at least, but should be more often)

edit: as well as backing up for every new address generated manually