Do compliment her on her trouser suit, but only if she's wearing a trouser suit: at no time give her any indication that you've already been through her wardrobe.
Don't dress as an admiral in the Japanese Navy, even if you are one, as this is far too formal.
Geeks: Don't say, "Your eyes, to me, hold all the intricate depth and mysterious beauty of the new Intel Pentium 4 Processor."
Don't phone her during the first date: that's just too keen.
Don't let her know you're a Chuckle Brother.
Don't take her on a tour of the Yacult factory on your first date ... she might not be as interested in the manufacture of Yacult as you are.
Girls: don't wave a semaphore flag at him, or flash a lamp in his face saying "M'aidez! M'aidez!" - you're just giving out confusing signals.
Don't wear a balloclava.
Don't show her videos of fights with your previous girlfriends. If you do, don't tell her to "Shut Up!" when a good bit's coming up.
Do be cool and suave after the first date, don't phone her straight away ... leave it about two years.
Don't say, "Do you know what 'Tromboning' is?"
Thanks to "The 99p Challenge" (Radio 4) for that. Any others?
http://www.bbc.co.uk/radio/aod/comedy.shtml?ninetynine#
[s](Too much time on my hands.)[/s]