When setting up a server, make sure your clock is accurate.

svn:r4197

doc/tor-doc.html

@@ -269,6 +269,8 @@ as a server on Windows now as well.)
 </p>
 
 <ul>
+<li>0. Verify that your clock is set correctly. If possible, synchronize
+your clock with public time servers.</li>
 <li>1. Edit the bottom part of your torrc (if you installed from source,
 you will need to copy torrc.sample to torrc first. Look for them in
 /usr/local/etc/tor/ on Unix).  If you installed a package, you should look