Mnemonic for "Perl Monks". Go to node "foo". As always, you can also enter a node ID there. I usually "enter" the monastery by typing "pm 106" into my addressbar, bringing me to The Default Node.
As an added bonus, bookmark URLs can be javascript, so you can make it "do the right thing" even if you don't specify a node Id...
<DT><A HREF="javascript: var s = %22%s%22; self.location = ((%22%s%22
+== s) ? %22http://www.perlmonks.org/%22 : (%22http://www.perlmonks.or
+g/index.pl?node=%22 + s))" ADD_DATE="1049314231" LAST_MODIFIED="10493
+14310" SHORTCUTURL="pm">PerlMonks</A>