Rules of the Game

1) Secure a supply of I Said Please!^TM badges using the design to the left and keep them about your person at all times.
2) Go about your daily business until somebody requests something from or of you.
3) Did they say please? If they didn't, go back to step 2.
4) If they DID say please, you've got 'em. After they've made their request, say in your most condescending voice, "Please...", as though you won't do a damned thing until they tack the word onto their request.
5) At this point the spell will have been cast and your unwitting victim will have no other option than to vainly point out "I said please!"
6) At this point you have defeated them and earned the right to produce an I Said Please!^TM badge from your secret supply and attach it securely to their lapel.
7) If they receive their badge with good grace, you might want to consider granting their request, but this shall have no bearing on the game, which you have already won.

Examples

Round One
Helen: Hi, Erkel.
Erkel: Hi, Helen. How's the family?
Helen: They're all asleep. Say, could you pass me that box of staples?
Erkel cannot proceed from this request and may as well pass Helen the bloody staples.
Helen: Thanks.

Round Two
Helen: Hello again, Erkel.
Erkel: Helen. Doing okay?
Helen: Not too bad. Say, could I have a few more staples, please?
Erkel's moment has arrived!
Erkel: "Please..."
Helen: I said please!
Erkel triumphs, and may now present Helen with her badge.