Mine

rsync -r -u -l --links -p -o -g -D -t --delete --delete-during -e 'ssh' --exclude-from='/root/rsync.exclude' -z --stats --progress / [target ip]:/

rsync.exclude:

- /etc/network/interfaces
- /tmp
- /proc
- /sys/*
- /dev
- /var/cache/apt/archives/*
- /var/lib/dhcp3/*
- /var/log/*
- /var/run/*