co-worker gift ettiquete

OK so whats the protocol for giving gifts to your co-workers, and even more importantly, to your boss?

In my office, our boss gives everyone a gift, and last year, at least to my knowledge, noone really gave her anything. Unless it was all on the DL and I was unaware. I'm realizing now that was probably the case. B/c I've watched a parade of people head into Kathy's office with gift bags this morning. Doh!

As far as co-workers, the girls in my office did a secret santa, so I thought I was in the clear when I gave the wonderful "I like you: hospitality under the influence" by Amy Sedaris to my friend Roxy, the name I picked this year. But no. I came in this AM to a slew of stuff on my desk from people. Its nothing big - the usual candy canes, holiday coffee mug with candy in it - but I brought absolutely nothing in for anyone. I mean some of my closest friends work with me and I didn't get them anything just b/c I thought that it wouldn't be fair not to gift to everyone, plus we agreed on secret santa.

So what do you think? If I bring in gifts next week am I the slacker of all slackers? Or do I just not bring in anything at all. I mean with all I've had going on, noone would hold it against me...