out of curiosity-- I hope you get a holiday bonus for those days, right?
HA that's funny! Well, some may, but i certainly would be shocked to hear it.
Did you really have to say this three times?
you'd be shocked at how many people have NO IDEA how to tip.

for instance, if you keep me at my job an hour after close, and your devil child has made a huge mess of my table, you should be compensating for the fact that i had to stay until you left and then clean up after you. We don't get paid hourly, so it really stinks when people don't respect that we have lives, too.
yes, we know what we're getting ourselves into when we wait tables, but that doesn't necessarily means we WANT to do it. i am a college graduate - do you REALLY think i want to be in a service position? HECK NO. But i need the money, and i can't find a decent job otherwise, and i'm pretty gosh darn good at what i do, so i'm doing it...there are good parts, and there are bad parts, just like any job, but it certainly hurts worse when you're not getting fairly compensated for it.
i do acknowledge that tipping is not mandatory, and i agree that it should be based on the merit of the server - but if the guest hadn't created the demand for service, then we wouldn't have to work. Y'know, a little generosity won't be bad for your karmic juju...
i know i do

any time i get a nice tip, even if it's not extravagantly over 20%...it's just a nice thing to do, if you can spare it. It may be only a dollar or two more for you, but it can really add up for us!