Backing up postgresql data

[Pat Maddox]

I've got postgresql 8 running on my system, and want to do nightly
backups of the database.  I took a look at the docs, and there are a
few methods of doing backups - pg_dump, file system level, and using
WAL.  I just want to be able to rsync my data every night, maybe every
few hours, so that I can recover it if there are any problems...so
what's the best way to do this.  Are there any scripts or utilities
available to make my life easy?

Thanks,
Pat