Simple backup routine

So I created a little backup routine for my server. It uses Dropbox to store an archive of my server logs and /etc. It simply rsync's the directories excluding old files, symlinks and empty directories, tar all of it and puts it into a directory that's synchronized with Dropbox.

All of that is scheduled daily with anacron.

There are two big limitations that I can see so far:

All in all I think this is an OK solution for a small-traffic personal server.