Don't forget to have a look now and then inthe Admin/Recommend section ; there might be some spam to clear off.  

If your site is targeted by spammers, you may install the cryptograph plork, available here, on Papinou's website.

Another section to keep an eye to is admin/Maintenance, which stands for a kind of recycle bin which the deleted datas. Take the time to empty it from time to time and and then launch an integrity control.