The grass is greener where you water it.
I love watching people. I like to sit back, and watch peoples expressions, their body movements, their reactions to certain things. I don't really consider it eavesdropping, as I am not paying attention to the conversation, and I don't usually hear what's going on. The other day I was watching a few developers from a larger company here in town bicker about something.. A friend of mine joined their group and saw I was drinking some coffee and invited me over. The conversation soon turned towards working conditions, job satisfaction, salary, management etc... really whatever a group of developers talk about at a coffee shop. Now many would think we'd talk about games, however as "Geeks" we must maintain the persona that we have lives (note Geeks, not nerds... Geeks).
One person then mentioned the well coined phrase "Well the grass is always greener on the other side of the fence". At that point I had to but in and tell him to give his head a shake. The grass is greener where you water it!
As a working individual it is your duty, heck it's your God given duty to put 100% into your career / job. It doesn't matter if it's full time, part time, a "stepping stone", or whatever. If you are getting paid for a job, put your all into it because that's really what you're getting paid for. If you think the grass is greener on the other side, look at where you're at. Think of what makes the grass greener on the other side and bring it up with your manager / boss. Now there are some cases where the grass you're currently on was laid on a bed of concrete, in those rare occasions even the dirt looks greener (And you might want to either talk to your manager about buying an excavator if you're in this boat).
Yes this is a bit of a rant, and it might be because I'm a new dad and my career is very important to my family. But wherever you are in your career, make it the best it can be. Put your all into it. Yes, the company across the street might have the newest computers, or the company across the way has lunch time gaming time... whatever it is, if you put your all into where you are, whenever you decide to move on you'll do it with integrity.
I'm going to change my babies poopy diaper now.