1) Guys should never be
self-centered! Always think about how we girls feel from time to time.
2) Guys should never
stand a girl
up! If you promised to do something for the girl, don't back out on the last minute or conveniently disappear at the time the promise is supposed to be executed.
3) Guys should never
make girls
feel undesirable. Try to compliment her sometimes. Like, "You've got a great smile." or "You always look so good!"

4) Guys should never leave girls
hanging. Do tell her if you like her or not so she would stop guessing. It gets frustrating for girls at some point.
5) Guys should never
lead a girl
on. It's just plain evil. Emotions should never be a plaything.
6) Guys should never make a girl
wait if she's hungry!
e.g. girl: Where are you na?
boy: I'm home pa eh. Why?
girl: Diba we were supposedto meet at 7:30 for dinner?
boy: Pagod na ako eh...pwede 8:30 nalang?
girl: I have hyperacidity kaya... can we eat earlier?
boy: 8:15...I just came home from a game.
girl: I'll eat ahead.
boy: Okay.
Diba? Insensitive.

7) Guys should never be
cheap. I don't mean that you should always take girls to grand places and spend much. What I mean is that, you don't have to tell the girl how much everything costs on your date. Worst if you always let her shoulder half of the bill everytime.
8) Guys should never make
feeble excuses. We can spot one immediately especially if it's uber lame. It annoys us how stupid you think we are to fall for that, and how you are making yourself look like a jerk.
9) Guys should never
LIE to girls. Especially on important matters. Trust is very important. Once it's lost, it would be really hard to regain.
10) Guys should never
CHEAT on girls. If you're lucky enough to have a second chance, don't blow it again.