Taking pride in my job, and doing it well. If something's worth doing, it's worth doing well. Might not like every aspect of it, but appreciating it's a hell of a lot better than what a lot of people have, I'm good at it, and I provide a very important service to the company and our customers. My predecessor gave me about 1.5 hours of training before handing the job off to me, so I learned on the fly. And that's often the best way to learn.
Don't expect to 'love' your job--if you do, you're extremely lucky. Don't think it's going to be a blast every day, and don't get disappointed when you realize Joe Jerkwad in the cubicle next to you just got the promotion you were hoping for. Karma comes back around, things happen for a reason.
But don't work at a job you hate. Not "don't feel like working today", but *hate*. I've only done that once, and it was miserable. Eventually I quit with, mmm, about 12 hours notice. Locked the keys in the safe, said "We're outta here, hope you find someone to open up in the morning." But every other job, from the mundane [stocking shelves at a retail store] to the unusual [toting dead disemboweled deer from the reefer to the butcher], I've looked at a job that needed to be done [obviously, since I was getting paid for it], done my best at, and learned from it.
