regular maintenance

[Jeff Donovan]

greetings

I have had a transparent Squid + SquidGuard server running great for 
about a month now.
I have a few questions about regular maintenance.
At night I run a Cron job that ..../squid -k rotate. this works great 
for my logs so that they do not get to fat. Are there other things I 
should be doing to keep this machine healthy?
What are some of the health checks you guys look for?

TIA

--jeff