After you have clicked on "Guest Book" this form will come up. Just fill in the blanks 

as the picture below shows, then click on "save entry" at the bottom of the page.

 

Next, the comments will be sent to me for validation...this way I can make sure 

there are no "inappropriate" messages posted for the world to see.

 

It does say that you will NOT be notified when your message is posted, however

if you ask me nicely in the comments section, I'll send you an email as soon as I post your message.

 

Here are just a couple of ideas that you could put in the comments section: