At each system restart, userspace messages will be logged to “/var/log/boot”.
This will help to analyse problems on remote systems, like you have a monitor during a boot progress.
Was tested on Debin Wheezy:
apt-get install bootlogd
After reboot the system will log into /var/log/boot.
There are some ascii sight so we have to make it more human readable:
cp /var/log/boot . && sed $'s/\^\[/\E/g;s/\[1G\[/\[27G\[/' boot